In a line of similar type books it would be impossible to distinguish this from the real thing. In fact it is (21 x 17 x 7.5)cm metal safe box, covered & disguised to look like a World Atlas. Even if the safe is discovered a three-number combination is still needed to gain access to its contents. Plenty big enough to keep cash, jewellery & confidential papers away from prying eyes, even though it may be right in front of them.