diff --git a/CHANGELOG.md b/CHANGELOG.md
index 16a25282ac3..80be8bb48fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ### New features:
 
+* Add the notion of AddressBooks
 * Allow customization of life event types
 
 ### Enhancements:
diff --git a/app/Helpers/AccountHelper.php b/app/Helpers/AccountHelper.php
index 497454b078a..dc711276d2b 100644
--- a/app/Helpers/AccountHelper.php
+++ b/app/Helpers/AccountHelper.php
@@ -40,7 +40,7 @@ public static function hasLimitations(Account $account): bool
      */
     public static function hasReachedContactLimit(Account $account): bool
     {
-        return $account->contacts()->real()->active()->count() >= config('monica.number_of_allowed_contacts_free_account');
+        return $account->allContacts()->real()->active()->count() >= config('monica.number_of_allowed_contacts_free_account');
     }
 
     /**
@@ -54,7 +54,7 @@ public static function canDowngrade(Account $account): bool
         $canDowngrade = true;
         $numberOfUsers = $account->users()->count();
         $numberPendingInvitations = $account->invitations()->count();
-        $numberActiveContacts = $account->contacts()->active()->count();
+        $numberActiveContacts = $account->allContacts()->active()->count();
 
         // number of users in the account should be == 1
         if ($numberOfUsers > 1) {
diff --git a/app/Helpers/SearchHelper.php b/app/Helpers/SearchHelper.php
index fc775e0f95f..4c2a4737b12 100644
--- a/app/Helpers/SearchHelper.php
+++ b/app/Helpers/SearchHelper.php
@@ -16,9 +16,10 @@ class SearchHelper
      * @param  string $needle
      * @param  string $orderByColumn
      * @param  string $orderByDirection
+     * @param  string|null $addressBookName
      * @return Builder
      */
-    public static function searchContacts(string $needle, string $orderByColumn, string $orderByDirection = 'asc'): Builder
+    public static function searchContacts(string $needle, string $orderByColumn, string $orderByDirection = 'asc', string $addressBookName = null): Builder
     {
         $accountId = Auth::user()->account_id;
 
@@ -41,9 +42,11 @@ public static function searchContacts(string $needle, string $orderByColumn, str
                 ]);
             });
 
-            return $b->orderBy($orderByColumn, $orderByDirection);
+            return $b->addressBook($accountId, $addressBookName)
+                ->orderBy($orderByColumn, $orderByDirection);
         }
 
-        return Contact::search($needle, $accountId, $orderByColumn, $orderByDirection);
+        return Contact::search($needle, $accountId, $orderByColumn, $orderByDirection)
+            ->addressBook($accountId, $addressBookName);
     }
 }
diff --git a/app/Http/Controllers/Contacts/IntroductionsController.php b/app/Http/Controllers/Contacts/IntroductionsController.php
index 4929d2ea829..ef97048697c 100644
--- a/app/Http/Controllers/Contacts/IntroductionsController.php
+++ b/app/Http/Controllers/Contacts/IntroductionsController.php
@@ -21,7 +21,7 @@ class IntroductionsController extends Controller
      */
     public function edit(Contact $contact)
     {
-        $contacts = auth()->user()->account->contacts()
+        $contacts = $contact->siblingContacts()
                         ->real()
                         ->active()
                         ->get();
diff --git a/app/Http/Controllers/DAV/Backend/CalDAV/AbstractCalDAVBackend.php b/app/Http/Controllers/DAV/Backend/CalDAV/AbstractCalDAVBackend.php
index 714e35d6db0..2095d6c5131 100644
--- a/app/Http/Controllers/DAV/Backend/CalDAV/AbstractCalDAVBackend.php
+++ b/app/Http/Controllers/DAV/Backend/CalDAV/AbstractCalDAVBackend.php
@@ -15,7 +15,7 @@ abstract class AbstractCalDAVBackend implements ICalDAVBackend, IDAVBackend
 
     public function getDescription()
     {
-        $token = DAVSyncPlugin::SYNCTOKEN_PREFIX.$this->refreshSyncToken()->id;
+        $token = DAVSyncPlugin::SYNCTOKEN_PREFIX.$this->refreshSyncToken(null)->id;
         $des = [
             'id' => $this->backendUri(),
             'uri' => $this->backendUri(),
diff --git a/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVBackend.php b/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVBackend.php
index 961a5c9522e..047db06091f 100644
--- a/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVBackend.php
+++ b/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVBackend.php
@@ -125,7 +125,7 @@ public function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limi
     {
         $backend = $this->getBackend($calendarId);
         if ($backend) {
-            return $backend->getChanges($syncToken);
+            return $backend->getChanges($calendarId, $syncToken);
         }
 
         return [];
@@ -166,7 +166,7 @@ public function getCalendarObjects($calendarId)
     {
         $backend = $this->getBackend($calendarId);
         if ($backend) {
-            $objs = $backend->getObjects();
+            $objs = $backend->getObjects($calendarId);
 
             return $objs
                 ->map(function ($date) use ($backend) {
@@ -201,7 +201,7 @@ public function getCalendarObject($calendarId, $objectUri)
     {
         $backend = $this->getBackend($calendarId);
         if ($backend) {
-            $obj = $backend->getObject($objectUri);
+            $obj = $backend->getObject($calendarId, $objectUri);
 
             if ($obj) {
                 return $backend->prepareData($obj);
@@ -257,7 +257,7 @@ public function updateCalendarObject($calendarId, $objectUri, $calendarData): ?s
         $backend = $this->getBackend($calendarId);
 
         return $backend ?
-            $backend->updateOrCreateCalendarObject($objectUri, $calendarData)
+            $backend->updateOrCreateCalendarObject($calendarId, $objectUri, $calendarData)
             : null;
     }
 
diff --git a/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVBirthdays.php b/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVBirthdays.php
index eaf5abde6f4..697a6213b31 100644
--- a/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVBirthdays.php
+++ b/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVBirthdays.php
@@ -95,10 +95,11 @@ private function hasBirthday($contact)
     /**
      * Returns the date for the specific uuid.
      *
+     * @param string|null $collectionId
      * @param string  $uuid
      * @return mixed
      */
-    public function getObjectUuid($uuid)
+    public function getObjectUuid($collectionId, $uuid)
     {
         return SpecialDate::where([
             'account_id' => Auth::user()->account_id,
@@ -111,10 +112,10 @@ public function getObjectUuid($uuid)
      *
      * @return \Illuminate\Support\Collection
      */
-    public function getObjects()
+    public function getObjects($collectionId)
     {
-        $contacts = Auth::user()->account
-                    ->contacts()
+        // We only return the birthday of default addressBook
+        $contacts = Auth::user()->account->contacts()
                     ->real()
                     ->active()
                     ->get();
@@ -130,7 +131,7 @@ public function getObjects()
     /**
      * @return string|null
      */
-    public function updateOrCreateCalendarObject($objectUri, $calendarData): ?string
+    public function updateOrCreateCalendarObject($calendarId, $objectUri, $calendarData): ?string
     {
         return null;
     }
diff --git a/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVTasks.php b/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVTasks.php
index a08a94e7087..8e995d69725 100644
--- a/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVTasks.php
+++ b/app/Http/Controllers/DAV/Backend/CalDAV/CalDAVTasks.php
@@ -42,7 +42,7 @@ public function getDescription()
      *
      * @return \Illuminate\Support\Collection
      */
-    public function getObjects()
+    public function getObjects($collectionId)
     {
         return Auth::user()->account
                     ->tasks()
@@ -52,10 +52,11 @@ public function getObjects()
     /**
      * Returns the contact for the specific uuid.
      *
+     * @param mixed|null $collectionId
      * @param string  $uuid
      * @return mixed
      */
-    public function getObjectUuid($uuid)
+    public function getObjectUuid($collectionId, $uuid)
     {
         return Task::where([
             'account_id' => Auth::user()->account_id,
@@ -123,11 +124,11 @@ public function prepareData($task)
      * @param string $calendarData
      * @return string|null
      */
-    public function updateOrCreateCalendarObject($objectUri, $calendarData): ?string
+    public function updateOrCreateCalendarObject($calendarId, $objectUri, $calendarData): ?string
     {
         $task_id = null;
         if ($objectUri) {
-            $task = $this->getObject($objectUri);
+            $task = $this->getObject($this->backendUri(), $objectUri);
 
             if ($task) {
                 $task_id = $task->id;
@@ -167,7 +168,7 @@ public function updateOrCreateCalendarObject($objectUri, $calendarData): ?string
      */
     public function deleteCalendarObject($objectUri)
     {
-        $task = $this->getObject($objectUri);
+        $task = $this->getObject($this->backendUri(), $objectUri);
 
         if ($task) {
             try {
diff --git a/app/Http/Controllers/DAV/Backend/CalDAV/ICalDAVBackend.php b/app/Http/Controllers/DAV/Backend/CalDAV/ICalDAVBackend.php
index 14a13d2feae..ff6d2287686 100644
--- a/app/Http/Controllers/DAV/Backend/CalDAV/ICalDAVBackend.php
+++ b/app/Http/Controllers/DAV/Backend/CalDAV/ICalDAVBackend.php
@@ -55,10 +55,11 @@ public function getDescription();
      * The getChanges method returns all the changes that have happened, since
      * the specified syncToken in the specified calendar.
      *
+     * @param string|null $calendarId
      * @param string $syncToken
      * @return array
      */
-    public function getChanges($syncToken);
+    public function getChanges($calendarId, $syncToken);
 
     /**
      * Returns calendar object.
@@ -98,11 +99,12 @@ public function prepareData($obj);
      * calendar-data. If the result of a subsequent GET to this object is not
      * the exact same as this request body, you should omit the ETag.
      *
+     * @param string|null $calendarId
      * @param string $objectUri
      * @param string $calendarData
      * @return string|null
      */
-    public function updateOrCreateCalendarObject($objectUri, $calendarData): ?string;
+    public function updateOrCreateCalendarObject($calendarId, $objectUri, $calendarData): ?string;
 
     /**
      * Deletes an existing calendar object.
diff --git a/app/Http/Controllers/DAV/Backend/CardDAV/AddressBook.php b/app/Http/Controllers/DAV/Backend/CardDAV/AddressBook.php
index df2ffdba78a..0bef22d75eb 100644
--- a/app/Http/Controllers/DAV/Backend/CardDAV/AddressBook.php
+++ b/app/Http/Controllers/DAV/Backend/CardDAV/AddressBook.php
@@ -70,7 +70,7 @@ public function getLastModified(): ?int
     {
         $carddavBackend = $this->carddavBackend;
         if ($carddavBackend instanceof CardDAVBackend) {
-            $date = $carddavBackend->getLastModified();
+            $date = $carddavBackend->getLastModified(null);
             if (! is_null($date)) {
                 return (int) $date->timestamp;
             }
@@ -92,7 +92,7 @@ public function getSyncToken(): ?string
     {
         $carddavBackend = $this->carddavBackend;
         if ($carddavBackend instanceof CardDAVBackend) {
-            return (string) $carddavBackend->refreshSyncToken()->id;
+            return (string) $carddavBackend->refreshSyncToken(null)->id;
         }
 
         return null;
diff --git a/app/Http/Controllers/DAV/Backend/CardDAV/CardDAVBackend.php b/app/Http/Controllers/DAV/Backend/CardDAV/CardDAVBackend.php
index e9696792936..673f952334b 100644
--- a/app/Http/Controllers/DAV/Backend/CardDAV/CardDAVBackend.php
+++ b/app/Http/Controllers/DAV/Backend/CardDAV/CardDAVBackend.php
@@ -4,9 +4,8 @@
 
 use Sabre\DAV;
 use Illuminate\Support\Arr;
-use App\Models\User\SyncToken;
 use App\Models\Contact\Contact;
-use Sabre\VObject\Component\VCard;
+use App\Models\Account\AddressBook;
 use App\Services\VCard\ExportVCard;
 use App\Services\VCard\ImportVCard;
 use Illuminate\Support\Facades\Log;
@@ -55,14 +54,44 @@ public function backendUri()
      */
     public function getAddressBooksForUser($principalUri)
     {
-        $token = $this->getCurrentSyncToken();
+        $result = [];
+        $result[] = $this->getDefaultAddressBook();
+
+        $addressbooks = AddressBook::where('account_id', Auth::user()->account_id)
+            ->get();
+
+        foreach ($addressbooks as $addressbook) {
+            $result[] = $this->getAddressBookDetails($addressbook);
+        }
+
+        return $result;
+    }
+
+    private function getDefaultAddressBook()
+    {
+        $des = $this->getAddressBookDetails(null);
+
+        $me = auth()->user()->me;
+        if ($me) {
+            $des += [
+                '{'.CalDAVPlugin::NS_CALENDARSERVER.'}me-card' => '/'.config('laravelsabre.path').'/addressbooks/'.Auth::user()->email.'/contacts/'.$this->encodeUri($me),
+            ];
+        }
+
+        return $des;
+    }
+
+    private function getAddressBookDetails($addressbook)
+    {
+        $id = $addressbook ? $addressbook->name : $this->backendUri();
+        $token = $this->getCurrentSyncToken($addressbook);
 
         $des = [
-            'id'                => $this->backendUri(),
-            'uri'               => $this->backendUri(),
+            'id'                => $id,
+            'uri'               => $id,
             'principaluri'      => PrincipalBackend::getPrincipalUser(),
             '{DAV:}displayname' => trans('app.dav_contacts'),
-            '{'.CardDAVPlugin::NS_CARDDAV.'}addressbook-description' => trans('app.dav_contacts_description', ['name' => Auth::user()->name]),
+            '{'.CardDAVPlugin::NS_CARDDAV.'}addressbook-description' => $addressbook ? $addressbook->description : trans('app.dav_contacts_description', ['name' => Auth::user()->name]),
         ];
         if ($token) {
             $des += [
@@ -72,16 +101,7 @@ public function getAddressBooksForUser($principalUri)
             ];
         }
 
-        $me = auth()->user()->me;
-        if ($me) {
-            $des += [
-                '{'.CalDAVPlugin::NS_CALENDARSERVER.'}me-card' => '/'.config('laravelsabre.path').'/addressbooks/'.Auth::user()->email.'/contacts/'.$this->encodeUri($me),
-            ];
-        }
-
-        return [
-            $des,
-        ];
+        return $des;
     }
 
     /**
@@ -152,7 +172,7 @@ public function getExtension()
      */
     public function getChangesForAddressBook($addressBookId, $syncToken, $syncLevel, $limit = null)
     {
-        return $this->getChanges($syncToken);
+        return $this->getChanges($addressBookId, $syncToken);
     }
 
     /**
@@ -164,13 +184,16 @@ public function getChangesForAddressBook($addressBookId, $syncToken, $syncLevel,
     private function prepareCard($contact): array
     {
         try {
-            $vcard = app(ExportVCard::class)
-                ->execute([
-                    'account_id' => Auth::user()->account_id,
-                    'contact_id' => $contact->id,
-                ]);
-
-            $carddata = $vcard->serialize();
+            $carddata = $contact->vcard;
+            if (empty($carddata)) {
+                $vcard = app(ExportVCard::class)
+                    ->execute([
+                        'account_id' => Auth::user()->account_id,
+                        'contact_id' => $contact->id,
+                    ]);
+
+                $carddata = $vcard->serialize();
+            }
 
             return [
                 'id' => $contact->hashID(),
@@ -188,14 +211,24 @@ private function prepareCard($contact): array
     /**
      * Returns the contact for the specific uuid.
      *
+     * @param mixed|null $collectionId
      * @param string  $uuid
      * @return Contact
      */
-    public function getObjectUuid($uuid)
+    public function getObjectUuid($collectionId, $uuid)
     {
+        $addressBook = null;
+        if ($collectionId && $collectionId != $this->backendUri()) {
+            $addressBook = AddressBook::where([
+                'account_id' => Auth::user()->account_id,
+                'name' => $collectionId,
+            ])->first();
+        }
+
         return Contact::where([
             'account_id' => Auth::user()->account_id,
             'uuid' => $uuid,
+            'address_book_id' => $addressBook ? $addressBook->id : null,
         ])->first();
     }
 
@@ -204,11 +237,9 @@ public function getObjectUuid($uuid)
      *
      * @return \Illuminate\Support\Collection
      */
-    public function getObjects()
+    public function getObjects($addressBookId)
     {
-        return Auth::user()->account
-                    ->contacts()
-                    ->real()
+        return Auth::user()->account->contacts($addressBookId)
                     ->active()
                     ->get();
     }
@@ -229,12 +260,12 @@ public function getObjects()
      * calculating them. If they are specified, you can also ommit carddata.
      * This may speed up certain requests, especially with large cards.
      *
-     * @param mixed $addressbookId
+     * @param mixed $collectionId
      * @return array
      */
-    public function getCards($addressbookId)
+    public function getCards($collectionId)
     {
-        $contacts = $this->getObjects();
+        $contacts = $this->getObjects($collectionId);
 
         return $contacts->map(function ($contact) {
             return $this->prepareCard($contact);
@@ -255,7 +286,7 @@ public function getCards($addressbookId)
      */
     public function getCard($addressBookId, $cardUri)
     {
-        $contact = $this->getObject($cardUri);
+        $contact = $this->getObject($addressBookId, $cardUri);
 
         if ($contact) {
             return $this->prepareCard($contact);
@@ -323,7 +354,7 @@ public function updateCard($addressBookId, $cardUri, $cardData): ?string
     {
         $contact_id = null;
         if ($cardUri) {
-            $contact = $this->getObject($cardUri);
+            $contact = $this->getObject($addressBookId, $cardUri);
 
             if ($contact) {
                 $contact_id = $contact->id;
@@ -338,6 +369,7 @@ public function updateCard($addressBookId, $cardUri, $cardData): ?string
                     'contact_id' => $contact_id,
                     'entry' => $cardData,
                     'behaviour' => ImportVCard::BEHAVIOUR_REPLACE,
+                    'addressBookName' => $addressBookId == $this->backendUri() ? null : $addressBookId,
                 ]);
 
             if (! Arr::has($result, 'error')) {
@@ -385,8 +417,8 @@ public function deleteCard($addressBookId, $cardUri)
      */
     public function updateAddressBook($addressBookId, DAV\PropPatch $propPatch): ?bool
     {
-        $propPatch->handle('{'.CalDAVPlugin::NS_CALENDARSERVER.'}me-card', function ($props) {
-            $contact = $this->getObject($props->getHref());
+        $propPatch->handle('{'.CalDAVPlugin::NS_CALENDARSERVER.'}me-card', function ($props) use ($addressBookId) {
+            $contact = $this->getObject($addressBookId, $props->getHref());
 
             $data = [
                 'contact_id' => $contact->id,
diff --git a/app/Http/Controllers/DAV/Backend/IDAVBackend.php b/app/Http/Controllers/DAV/Backend/IDAVBackend.php
index 1828ea5c30c..1eeff749600 100644
--- a/app/Http/Controllers/DAV/Backend/IDAVBackend.php
+++ b/app/Http/Controllers/DAV/Backend/IDAVBackend.php
@@ -14,17 +14,19 @@ public function backendUri();
     /**
      * Returns the object for the specific uuid.
      *
+     * @param string|null $collectionId
      * @param string  $uuid
      * @return mixed
      */
-    public function getObjectUuid($uuid);
+    public function getObjectUuid($collectionId, $uuid);
 
     /**
      * Returns the collection of objects.
      *
+     * @param string|null $collectionId
      * @return \Illuminate\Support\Collection
      */
-    public function getObjects();
+    public function getObjects($collectionId);
 
     /**
      * Returns the extension for this backend.
diff --git a/app/Http/Controllers/DAV/Backend/SyncDAVBackend.php b/app/Http/Controllers/DAV/Backend/SyncDAVBackend.php
index fb99e8193b7..0a50628f425 100644
--- a/app/Http/Controllers/DAV/Backend/SyncDAVBackend.php
+++ b/app/Http/Controllers/DAV/Backend/SyncDAVBackend.php
@@ -14,14 +14,15 @@ trait SyncDAVBackend
      * If null is returned from this function, the plugin assumes there's no
      * sync information available.
      *
+     * @param string|null $collectionId
      * @return SyncToken|null
      */
-    protected function getCurrentSyncToken(): ?SyncToken
+    protected function getCurrentSyncToken($collectionId): ?SyncToken
     {
         $tokens = SyncToken::where([
             'account_id' => Auth::user()->account_id,
             'user_id' => Auth::user()->id,
-            'name' => $this->backendUri(),
+            'name' => $collectionId ?? $this->backendUri(),
         ])
             ->orderBy('created_at')
             ->get();
@@ -32,14 +33,15 @@ protected function getCurrentSyncToken(): ?SyncToken
     /**
      * Create or refresh the token if a change happened.
      *
+     * @param string|null $collectionId
      * @return SyncToken
      */
-    public function refreshSyncToken(): SyncToken
+    public function refreshSyncToken($collectionId): SyncToken
     {
-        $token = $this->getCurrentSyncToken();
+        $token = $this->getCurrentSyncToken($collectionId);
 
-        if (! $token || $token->timestamp < $this->getLastModified()) {
-            $token = $this->createSyncTokenNow();
+        if (! $token || $token->timestamp < $this->getLastModified($collectionId)) {
+            $token = $this->createSyncTokenNow($collectionId);
         }
 
         return $token;
@@ -48,15 +50,16 @@ public function refreshSyncToken(): SyncToken
     /**
      * Get SyncToken by token id.
      *
+     * @param string|null $collectionId
      * @return SyncToken|null
      */
-    protected function getSyncToken($syncToken)
+    protected function getSyncToken($collectionId, $syncToken)
     {
         /** @var SyncToken|null */
         return SyncToken::where([
             'account_id' => Auth::user()->account_id,
             'user_id' => Auth::user()->id,
-            'name' => $this->backendUri(),
+            'name' => $collectionId ?? $this->backendUri(),
         ])
             ->find($syncToken);
     }
@@ -64,14 +67,15 @@ protected function getSyncToken($syncToken)
     /**
      * Create a token with now timestamp.
      *
+     * @param string|null $collectionId
      * @return SyncToken
      */
-    private function createSyncTokenNow()
+    private function createSyncTokenNow($collectionId)
     {
         return SyncToken::create([
             'account_id' => Auth::user()->account_id,
             'user_id' => Auth::user()->id,
-            'name' => $this->backendUri(),
+            'name' => $collectionId ?? $this->backendUri(),
             'timestamp' => now(),
         ]);
     }
@@ -79,11 +83,12 @@ private function createSyncTokenNow()
     /**
      * Returns the last modification date.
      *
+     * @param string|null $collectionId
      * @return \Carbon\Carbon|null
      */
-    public function getLastModified()
+    public function getLastModified($collectionId)
     {
-        return $this->getObjects()
+        return $this->getObjects($collectionId)
                     ->max('updated_at');
     }
 
@@ -137,15 +142,16 @@ public function getLastModified()
      *
      * The limit is 'suggestive'. You are free to ignore it.
      *
+     * @param string $calendarId
      * @param string $syncToken
      * @return array|null
      */
-    public function getChanges($syncToken): ?array
+    public function getChanges($calendarId, $syncToken): ?array
     {
         $token = null;
         $timestamp = null;
         if (! empty($syncToken)) {
-            $token = $this->getSyncToken($syncToken);
+            $token = $this->getSyncToken($calendarId, $syncToken);
 
             if (is_null($token)) {
                 // syncToken is not recognized
@@ -155,7 +161,7 @@ public function getChanges($syncToken): ?array
             $timestamp = $token->timestamp;
         }
 
-        $objs = $this->getObjects();
+        $objs = $this->getObjects($calendarId);
 
         $modified = $objs->filter(function ($obj) use ($timestamp) {
             return ! is_null($timestamp) &&
@@ -168,7 +174,7 @@ public function getChanges($syncToken): ?array
         });
 
         return [
-            'syncToken' => $this->refreshSyncToken()->id,
+            'syncToken' => $this->refreshSyncToken($calendarId)->id,
             'added' => $added->map(function ($obj) {
                 return $this->encodeUri($obj);
             })->values()->toArray(),
@@ -179,7 +185,7 @@ public function getChanges($syncToken): ?array
         ];
     }
 
-    protected function encodeUri($obj)
+    protected function encodeUri($obj): string
     {
         if (empty($obj->uuid)) {
             // refresh model from database
@@ -196,21 +202,33 @@ protected function encodeUri($obj)
         return urlencode($obj->uuid.$this->getExtension());
     }
 
-    private function decodeUri($uri)
+    private function decodeUri($uri): string
     {
         return pathinfo(urldecode($uri), PATHINFO_FILENAME);
     }
 
+    /**
+     * Returns the contact uuid for the specific uri.
+     *
+     * @param string  $uri
+     * @return string
+     */
+    public function getUuid($uri): string
+    {
+        return $this->decodeUri($uri);
+    }
+
     /**
      * Returns the contact for the specific uri.
      *
+     * @param string|null $collectionId
      * @param string  $uri
      * @return mixed
      */
-    public function getObject($uri)
+    public function getObject($collectionId, $uri)
     {
         try {
-            return $this->getObjectUuid($this->decodeUri($uri));
+            return $this->getObjectUuid($collectionId, $this->getUuid($uri));
         } catch (\Exception $e) {
             // Object not found
         }
@@ -219,17 +237,19 @@ public function getObject($uri)
     /**
      * Returns the object for the specific uuid.
      *
+     * @param string|null $collectionId
      * @param string  $uuid
      * @return mixed
      */
-    abstract public function getObjectUuid($uuid);
+    abstract public function getObjectUuid($collectionId, $uuid);
 
     /**
      * Returns the collection of objects.
      *
+     * @param string|null $collectionId
      * @return \Illuminate\Support\Collection
      */
-    abstract public function getObjects();
+    abstract public function getObjects($collectionId);
 
     abstract public function getExtension();
 }
diff --git a/app/Http/Controllers/DashboardController.php b/app/Http/Controllers/DashboardController.php
index c675f632f87..adf62eeae1e 100644
--- a/app/Http/Controllers/DashboardController.php
+++ b/app/Http/Controllers/DashboardController.php
@@ -29,9 +29,9 @@ public function index()
             ->first();
 
         $numberOfContacts = $account->contacts()
-                                    ->real()
-                                    ->active()
-                                    ->count();
+            ->real()
+            ->active()
+            ->count();
 
         if ($numberOfContacts === 0) {
             return view('dashboard.blank');
diff --git a/app/Http/Controllers/Settings/SubscriptionsController.php b/app/Http/Controllers/Settings/SubscriptionsController.php
index c4d9d863ff5..30351c11fe6 100644
--- a/app/Http/Controllers/Settings/SubscriptionsController.php
+++ b/app/Http/Controllers/Settings/SubscriptionsController.php
@@ -177,7 +177,7 @@ public function downgrade()
         }
 
         return view('settings.subscriptions.downgrade-checklist')
-            ->with('numberOfActiveContacts', $account->contacts()->active()->count())
+            ->with('numberOfActiveContacts', $account->allContacts()->active()->count())
             ->with('numberOfPendingInvitations', $account->invitations()->count())
             ->with('numberOfUsers', $account->users()->count())
             ->with('accountHasLimitations', AccountHelper::hasLimitations($account))
diff --git a/app/Models/Account/Account.php b/app/Models/Account/Account.php
index e9ea5d9ba6c..14e4c08adb8 100644
--- a/app/Models/Account/Account.php
+++ b/app/Models/Account/Account.php
@@ -91,11 +91,26 @@ public function activities()
      *
      * @return HasMany
      */
-    public function contacts()
+    public function allContacts()
     {
         return $this->hasMany(Contact::class);
     }
 
+    /**
+     * Get the addressBook's contacts.
+     *
+     * @param string|null $addressBookName
+     * @return HasMany<Contact>
+     */
+    public function contacts(string $addressBookName = null)
+    {
+        $contacts = $this->allContacts();
+
+        return $addressBookName
+            ? $contacts->addressBook($this->id, $addressBookName)
+            : $contacts->addressBook();
+    }
+
     /**
      * Get the invitations associated with the account.
      *
diff --git a/app/Models/Account/AddressBook.php b/app/Models/Account/AddressBook.php
new file mode 100644
index 00000000000..5a38dd4e4d5
--- /dev/null
+++ b/app/Models/Account/AddressBook.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace App\Models\Account;
+
+use App\Models\User\User;
+use App\Models\Contact\Contact;
+use App\Models\ModelBinding as Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class AddressBook extends Model
+{
+    protected $table = 'addressbooks';
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'account_id',
+        'user_id',
+        'name',
+        'description',
+    ];
+
+    /**
+     * The attributes that aren't mass assignable.
+     *
+     * @var array
+     */
+    protected $guarded = ['id'];
+
+    /**
+     * The attributes that should be cast to native types.
+     *
+     * @var array
+     */
+    protected $casts = [
+    ];
+
+    /**
+     * Get the account record associated with the address book.
+     *
+     * @return BelongsTo
+     */
+    public function account()
+    {
+        return $this->belongsTo(Account::class);
+    }
+
+    /**
+     * Get the user record associated with the address book.
+     *
+     * @return BelongsTo
+     */
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    /**
+     * Get all contacts for this address book.
+     *
+     * @return HasMany
+     */
+    public function contacts()
+    {
+        return $this->hasMany(Contact::class);
+    }
+}
diff --git a/app/Models/Contact/Contact.php b/app/Models/Contact/Contact.php
index 4474e83817e..d3a0ac9e266 100644
--- a/app/Models/Contact/Contact.php
+++ b/app/Models/Contact/Contact.php
@@ -18,6 +18,7 @@
 use App\Models\Instance\AuditLog;
 use function Safe\preg_match_all;
 use Illuminate\Support\Collection;
+use App\Models\Account\AddressBook;
 use App\Models\Instance\SpecialDate;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Storage;
@@ -175,6 +176,34 @@ public function account()
         return $this->belongsTo(Account::class);
     }
 
+    /**
+     * Get the address book associated with the contact.
+     *
+     * @return BelongsTo
+     */
+    public function addressBook()
+    {
+        return $this->belongsTo(AddressBook::class);
+    }
+
+    /**
+     * Get the list of contacts from the same address book as this contact.
+     *
+     * @return HasMany<self>|null
+     */
+    public function siblingContacts(): ?HasMany
+    {
+        if ($this->account) {
+            if ($this->addressBook) {
+                return $this->account->contacts($this->addressBook->name);
+            }
+
+            return $this->account->contacts();
+        }
+
+        return null;
+    }
+
     /**
      * Get the gender of the contact.
      *
@@ -564,6 +593,28 @@ public function scopeNotActive($query)
         return $query->where('is_active', 0);
     }
 
+    /**
+     * Scope a query to only include contacts from given address book.
+     * 'null' value for address book is the default address book.
+     *
+     * @param Builder $query
+     * @param int|null $accountId
+     * @param string|null $addressBookName
+     * @return Builder
+     */
+    public function scopeAddressBook($query, int $accountId = null, string $addressBookName = null)
+    {
+        $addressBook = null;
+        if ($accountId && $addressBookName) {
+            $addressBook = AddressBook::where([
+                'account_id' => $accountId,
+                'name' => $addressBookName,
+            ])->first();
+        }
+
+        return $query->where('address_book_id', $addressBook ? $addressBook->id : null);
+    }
+
     /**
      * Mutator first_name.
      * Get the first name of the contact.
diff --git a/app/Models/Contact/Tag.php b/app/Models/Contact/Tag.php
index 35a55733651..ef91dfa12d9 100644
--- a/app/Models/Contact/Tag.php
+++ b/app/Models/Contact/Tag.php
@@ -48,13 +48,20 @@ public function contacts()
     public static function contactsCount()
     {
         return DB::table('contact_tag')->selectRaw('COUNT(tag_id) AS contact_count, name, name_slug')
-            ->join('tags', function ($join) {
-                $join->on('tags.id', '=', 'contact_tag.tag_id')
-                    ->on('tags.account_id', '=', 'contact_tag.account_id');
-            })
-            ->where('tags.account_id', auth()->user()->account_id)
-            ->groupBy('tag_id')
-            ->get()
-            ->sortByCollator('name');
+                    ->join('tags', function ($join) {
+                        $join->on('tags.id', '=', 'contact_tag.tag_id')
+                           ->on('tags.account_id', '=', 'contact_tag.account_id');
+                    })
+                    ->join('contacts', function ($join) {
+                        $join->on('contacts.id', '=', 'contact_tag.contact_id')
+                           ->on('contacts.account_id', '=', 'contact_tag.account_id');
+                    })
+                    ->where([
+                        'tags.account_id' => auth()->user()->account_id,
+                        'contacts.address_book_id' => null,
+                    ])
+                    ->groupBy('tag_id')
+                    ->get()
+                    ->sortByCollator('name');
     }
 }
diff --git a/app/Services/VCard/ImportVCard.php b/app/Services/VCard/ImportVCard.php
index 64d1ea71b03..7372d439993 100644
--- a/app/Services/VCard/ImportVCard.php
+++ b/app/Services/VCard/ImportVCard.php
@@ -21,6 +21,7 @@
 use App\Helpers\CountriesHelper;
 use Sabre\VObject\ParseException;
 use Sabre\VObject\Component\VCard;
+use App\Models\Account\AddressBook;
 use App\Models\Contact\ContactField;
 use App\Services\Contact\Tag\DetachTag;
 use App\Models\Contact\ContactFieldType;
@@ -86,6 +87,11 @@ class ImportVCard extends BaseService
      */
     protected $genders;
 
+    /**
+     * @var AddressBook|null
+     */
+    protected $addressBook;
+
     /**
      * Get the validation rules that apply to the service.
      *
@@ -110,6 +116,7 @@ function ($attribute, $value, $fail) {
                 'required',
                 Rule::in(self::$behaviourTypes),
             ],
+            'addressBookName' => 'nullable|string|exists:addressbooks,name',
         ];
     }
 
@@ -131,6 +138,13 @@ public function execute(array $data): array
                 ->findOrFail($contactId);
         }
 
+        if ($addressBookName = Arr::get($data, 'addressBookName')) {
+            AddressBook::where([
+                'account_id' => $data['account_id'],
+                'name' => $addressBookName,
+            ])->firstOrFail();
+        }
+
         return $this->process($data);
     }
 
@@ -140,6 +154,7 @@ private function clear()
         $this->genders = [];
         $this->accountId = 0;
         $this->userId = 0;
+        $this->addressBook = null;
     }
 
     /**
@@ -156,6 +171,13 @@ private function process(array $data): array
         }
         $this->userId = $data['user_id'];
 
+        if ($addressBookName = Arr::get($data, 'addressBookName')) {
+            $this->addressBook = AddressBook::where([
+                'account_id' => $data['account_id'],
+                'name' => $addressBookName,
+            ])->first();
+        }
+
         $entry = $this->getEntry($data);
 
         if (! $entry) {
@@ -382,7 +404,10 @@ private function getExistingContact(VCard $entry, $contact_id = null)
     {
         $contact = null;
         if (! is_null($contact_id)) {
-            $contact = Contact::where('account_id', $this->accountId)
+            $contact = Contact::where([
+                'account_id' => $this->accountId,
+                'address_book_id' => $this->addressBook ? $this->addressBook->id : null,
+            ])
                 ->find($contact_id);
         }
 
@@ -415,7 +440,13 @@ private function existingContactWithEmail(VCard $entry): ?Contact
                 'contact_field_type_id' => $this->getContactFieldTypeId(ContactFieldType::EMAIL),
             ])->whereIn('data', iterator_to_array($entry->EMAIL))->first();
 
-            if ($contactField) {
+            // filter contact field
+            //  - if no address book selected
+            //  - if the address book match the contact's contact field address book
+            if ($contactField && (
+                    ! $this->addressBook
+                    || $contactField->contact->address_book_id === $this->addressBook->id
+                )) {
                 return $contactField->contact;
             }
         }
@@ -439,6 +470,7 @@ private function existingContactWithName(VCard $entry)
             'first_name' => $contact->first_name,
             'middle_name' => $contact->middle_name,
             'last_name' => $contact->last_name,
+            'address_book_id' => $this->addressBook ? $this->addressBook->id : null,
         ])->first();
     }
 
@@ -456,8 +488,13 @@ private function importEntry($contact, VCard $entry): Contact
             $contact->account_id = $this->accountId;
             $contact->gender_id = $this->getGender('O')->id;
             $contact->setAvatarColor();
-            $contact->uuid = Str::uuid()->toString();
+            $contact->address_book_id = $this->addressBook ? $this->addressBook->id : null;
             $contact->save();
+
+            $this->importUid($contact, $entry);
+            if (empty($contact->uuid)) {
+                $contact->uuid = Str::uuid()->toString();
+            }
         }
 
         $this->importNames($contact, $entry);
@@ -472,6 +509,11 @@ private function importEntry($contact, VCard $entry): Contact
         $this->importSocialProfile($contact, $entry);
         $this->importCategories($contact, $entry);
 
+        // Save vcard content
+        if ($contact->address_book_id) {
+            $contact->vcard = $entry->serialize();
+        }
+
         $contact->save();
 
         return $contact;
diff --git a/database/migrations/2020_03_25_055551_add_address_book.php b/database/migrations/2020_03_25_055551_add_address_book.php
new file mode 100644
index 00000000000..6a77168de31
--- /dev/null
+++ b/database/migrations/2020_03_25_055551_add_address_book.php
@@ -0,0 +1,40 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddAddressBook extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('addressbooks', function (Blueprint $table) {
+            $table->bigIncrements('id');
+            $table->unsignedInteger('account_id');
+            $table->unsignedInteger('user_id');
+
+            $table->string('description', 500)->nullable();
+            $table->string('name', 100);
+            $table->timestamps();
+
+            $table->index('name');
+            $table->foreign('account_id')->references('id')->on('accounts')->onDelete('cascade');
+            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('addressbooks');
+    }
+}
diff --git a/database/migrations/2020_03_25_082324_add_contact_address_book_id.php b/database/migrations/2020_03_25_082324_add_contact_address_book_id.php
new file mode 100644
index 00000000000..30a87836a98
--- /dev/null
+++ b/database/migrations/2020_03_25_082324_add_contact_address_book_id.php
@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddContactAddressBookId extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('contacts', function (Blueprint $table) {
+            $table->unsignedBigInteger('address_book_id')->after('account_id')->nullable();
+            $table->foreign('address_book_id')->references('id')->on('addressbooks')->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('contacts', function (Blueprint $table) {
+            $table->dropColumn('address_book_id');
+        });
+    }
+}
diff --git a/database/migrations/2020_03_25_201407_add_contact_vcard_data.php b/database/migrations/2020_03_25_201407_add_contact_vcard_data.php
new file mode 100644
index 00000000000..8d5f3953a2c
--- /dev/null
+++ b/database/migrations/2020_03_25_201407_add_contact_vcard_data.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddContactVcardData extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('contacts', function (Blueprint $table) {
+            $table->mediumText('vcard')->after('gravatar_url')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('contacts', function (Blueprint $table) {
+            $table->dropColumn('vcard');
+        });
+    }
+}
diff --git a/tests/Unit/Traits/SearchableTest.php b/tests/Unit/Traits/SearchableTest.php
index 6ea251ea17b..03eb86c3ab8 100644
--- a/tests/Unit/Traits/SearchableTest.php
+++ b/tests/Unit/Traits/SearchableTest.php
@@ -55,7 +55,7 @@ public function testFailingSearchContacts()
     {
         $contact = factory(Contact::class)->create(['first_name' => 'TestShouldFail']);
         $searchResults = $contact->search('TestWillSucceed', $contact->account_id, 'created_at', 'desc')
-            ->get();
+            ->paginate(10);
 
         $this->assertFalse($searchResults->contains($contact));
     }