Hollow Book

A hollow book it's the perfect place to keep small things.
I store my rings in them.
I used this tutorial (http://how2dostuff.blogspot.gr/2006/02/how-to-make-secret-hollow-book.html) to create my books.
The only difference is that at the end I put felt on the inside to make it look more neat.
I use old dictionaries and traveling guides.