Most burglars spend less than six minutes inside a victim's home and only have time to check the most obvious places for valuables. Our book safes enable you to hide your valuables in the last place a thief would think to look- in a common book. And to further protect your belongings, the Streetwise Locking Book Safe with two keys has a built-in steel box. It is designed to look like The New English Dictionary on the outside with a steel box on the inside. Covered under a year warranty. Dimensions of inner compartment: 2 x 5.5 x 9 inches.