diff --git a/heroscript/manual/book_collections.md b/heroscript/manual/book_collections.md
index 8f8bd66..b194a41 100644
--- a/heroscript/manual/book_collections.md
+++ b/heroscript/manual/book_collections.md
@@ -1,6 +1,6 @@
 ```js
 
-!!book.generate name:'manual' title:'ThreeFold Manual Version' printbook:'false' foldlevel:1
+!!book.generate name:'manual' title:'ThreeFold Manual Version' printbook:false foldlevel:1
         url:'https://git.ourworld.tf/tfgrid/info_tfgrid/src/branch/development_manual/books/manual'
 
 !!doctree.add