Here’s a present idea – a hollow book to hide anything you want to hide You can buy them or make your own. A hollow book can be a nifty way to hide something, whether it’s a spare key, a secret note, or even money. Most people wouldn’t think to browse your library for private or personal things. It’s also a great way to pass something to someone discreetly–an unsuspecting onlooker will just think you’re sharing a very good read! Though it’s a shame not to have the book to read