diff --git a/README b/README
index 466bf92..ba46f18 100644
--- a/README
+++ b/README
@@ -55,3 +55,4 @@ TODO-19:	icons on wish list, etc.?  (not sure I really want them, but if so)
 TODO-20:	ORM all books load is slow
 			- should I lazy load all books (ajax the 2nd->last pages in, or not use ORM, and do a quick db.execute()....)
 TODO-21:	allow a way to add a book as a child of another existing book (opposite of rem_sub_book)
+TODO-22:	adding a sub-book when the parent book is in a series, need to add a bsl for it and make it the next (probably)