• The Art and Craft of Handmade Books by Shereen LaPlantz
• Creating Handmade Books by Alisa Golden
• Keith Smith Books (Online site listed under Reading and Resources)
Interested in hand papermaking?
• The Papermaker's Companion: The Ultimate Guide to Making and Using Handmade Paper by Helen Hiebert
• The Art and Craft of Papermaking by Sophie Dawson
There are many other books that I found informative and helpful, but these are ones I'd recommend highly to begin. If you do a search on Amazon or other book shops, you'll be able to find more information about them. I also love Keith Smith's books, especially his Volume II.