diff --git a/book/external/Nested-Books b/book/external/Nested-Books
index fd06f98..f6411e2 160000
--- a/book/external/Nested-Books
+++ b/book/external/Nested-Books
@@ -1 +1 @@
-Subproject commit fd06f9871aec3cbb255f3724dc9be77fd8b45ae3
+Subproject commit f6411e26f52b806ce1d443a9f35839b7f0536329