Can I add cookbooks that do not have ISBN numbers? We have recently added a new feature which allows you to add any book to the EYB Library. Please see further details here. Related articles Can I get a book added to the EYB Library? NEW FEATURE: Adding a Book to the EYB Library Adding books to your Bookshelf I keep my cookbooks in two different locations - do I need two Bookshelves? Is there a limit to the number of cookbooks I can have on my Bookshelf?