Very stealth, these books are made from rather large real books. The first fifty pages are normal, but when you get to the middle of the book there is a storage compartment that has been pressed into the book. A velvet lined box that can hold quite a bit. Comes in various boring titles. Looks extremely realistic when closed. Book contains empty hiding place. "Book" not for reading. Internal Compartment Dimensions (Approximate) Length 7 1/2 inches Width 4 1/2 inches Depth 1 1/2 inches