diff --git a/book/external/Nested-Books b/book/external/Nested-Books
index 1375546..c2ebd1f 160000
--- a/book/external/Nested-Books
+++ b/book/external/Nested-Books
@@ -1 +1 @@
-Subproject commit 137554617dcf09e8bf2dc2188def09dce92824fe
+Subproject commit c2ebd1fdad5abddb62d7f4c876f2f20d88d23f49