Book Safe with Combo Lock. Designed to hide valuables in plain sight. Made to look like any other book on the shelf, this custom design is not available anywhere else and will blend in perfectly on any bookshelf. The large interior cavity can hold money, spare keys, jewelry, passports, or other important items. The locking door features a programmable, triple-tumbler combination lock to keep valuables secure. Combination lock can be set to any combination you choose.