The conceal bookshelf is a clever idea where a shelf is installed into the wall. The bottom book is affixed to the protruding shelf which creates a stable base upon which to stack other books. This is a great idea for a dorm room where space is at a premium. Textbooks while not in use can be stored away on the bookshelf and appear to “float in air”. The maximum weight allowed is 20 lbs. Price: $12.99.