Multi-Book Secret Storage Compartment

You are probably already familiar with the classic "Secret Book Compartment" project. You can find variations of this project all over the internet. The basic concept is simple. You hollow out a large book and you use the cutout space to hide stuff. But what if you want to hide something that is larger than all of your books. Well, you can hide larger objects by combining multiple books into one large multi-book container. It's a fun way to reuse those old reference books that you never read.

Instructable: http://www.instructables.com/id/Multi-Book-Secret-Storage-Compartment/