From ded6b6faf4f01aa3e9b25ffaa5f1cc6930c6b4aa Mon Sep 17 00:00:00 2001
From: tink2123 <y_tink@163.com>
Date: Fri, 14 Sep 2018 14:19:42 +0800
Subject: [PATCH] update book submodule in develop branch

---
 external/book | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/book b/external/book
index 2b81d844673c1..fe1df41a7f45a 160000
--- a/external/book
+++ b/external/book
@@ -1 +1 @@
-Subproject commit 2b81d844673c1ba09fd596d70492375f2998ad36
+Subproject commit fe1df41a7f45a02f5c36a5dc55053b6ba04bafa0