Buy BookBook for iPhone. It is a wallet and iPhone case rolled into one pocket-sized, vintage book. Open this beautifully designed leather book and you will see a wallet on the left and a slot for your iPhone 4/4S on the right. Trade your wallet for this handsome little book and you’ll have one less thing in your pocket or purse when you walk out the door. And, as long as you remember your phone, you’ll never forget your wallet again.