Here is a very neat 3D book to make.
If you know how to do the origami flower fold/squash book, you can do the same fold using circles rather than squares to create this book.
It consists of 4 same sized circles cut from 12 x 12 card stock, folded origami flower fold style, then glued back to back with a front cover and a back cover.
The video shows one way to create a book and I really like what she did with the folds — made pockets by gluing the backs down to the card stock.
The written instructions with pictures by Kathy Black at Charmed Cards and Crafts shows how to add 3D cut outs to create a scene that fold up amd into the book.
Enjoy. A fun project indeed.