With millions of books on the shelves, which one is hiding the valuables Better than a locked safe and a hundred times cheaper! Conceal your valuables right on your bookshelf. Recognised by Police forces, Neighbourhood Watch groups and Insurance companies worldwide as an excellent deterrent to theft, the Collins Safe Book is the ideal place to hide money, jewellery and valuables. Just slide open the bottom to reveal a totally inconspicuous hiding place. The last place a thief will look is in a Safe Book!