In the latest issue of make we have a similar project that involves hollowing out a book to make a palm pilot notebook. I’m on the lookout for the perfect book to secretly hold my cellphone!
Mix a solution of white glue and water. Just enough for the glue to be runny, and absorbed by the edge of the book’s pages. 50% to 70% glue (30% to 50% water) worked well for me. – Half a film canister full was enough for this book.