diff --git a/book/external/Nested-Books b/book/external/Nested-Books
index 365291d..0660e78 160000
--- a/book/external/Nested-Books
+++ b/book/external/Nested-Books
@@ -1 +1 @@
-Subproject commit 365291d0d1ba29c9d032c8ba2ec399b03e5d1176
+Subproject commit 0660e7846161be8e1aec42321af727680b851179