diff --git a/book/external/Nested-Books b/book/external/Nested-Books
index 7ce10eb..fd06f98 160000
--- a/book/external/Nested-Books
+++ b/book/external/Nested-Books
@@ -1 +1 @@
-Subproject commit 7ce10eb625c878f1fbd008b67bd266d61461541b
+Subproject commit fd06f9871aec3cbb255f3724dc9be77fd8b45ae3