The pages inside this book are different weights and textures. One of the pages in each of then12 signatures (groups of folded paper) has a little envelope attached. This book would be fun to use as a travel journal, or photo album. You can add lots of writing and pictures and it would definitely be a one of a kind. I've already had two people say they would buy it. I'm reluctant to sell it, because it was fun to make and is so unique. Maybe if I make two or three more I'll be willing to sell one?