diff --git a/book b/book
index 4c4ccdb..e0714e8 160000
--- a/book
+++ b/book
@@ -1 +1 @@
-Subproject commit 4c4ccdb9b2878ed169b4aded8aafe6a1ae234c8d
+Subproject commit e0714e81c29d7735813c1c2139140d1540ec4144