A book with and empty inside great for hiding things from possible intruders. You will need a book, an X Acto knife, tape (not see through), a paintbrush, and glue.
Step 1: Homemade Mod Podge
Mix one part water with three parts glue until you have the consistency of heavy cream. This will be used to keep the outside of the book in good condition and keep the pages in place.
Step 2: Apply the Glue
Apply the glue to the top, right, and bottom side of the book in order to keep the pages in place. I found that the best way to do this was by doing two small layers of glue, one once the other had finished drying.
Step 3: Measuring
Measure and mark the desired place in your book that you would like to hollow out.
Step 4: Hollowing Out the Book
Use the X Acto knife to slowly cut along the lines and hollow out the book. This will be a long process.
Step 5: Tape (optional)
Use tape to cover the inside part of the book that you cut out. This is purely for aesthetic purposes and completely optional but I prefer doing it this way.