diff --git a/book/external/Nested-Books b/book/external/Nested-Books
index 8b2eecf..f6411e2 160000
--- a/book/external/Nested-Books
+++ b/book/external/Nested-Books
@@ -1 +1 @@
-Subproject commit 8b2eecf5807f64a7f379792b2808863ae61c0e7f
+Subproject commit f6411e26f52b806ce1d443a9f35839b7f0536329