Twelve South has introduced its new BookBook case for the iPhone 4. Like the company’s prior BookBook cases, the BookBook for iPhone 4 is designed to look like an actual book, featuring a handmade leather case with hard-back covers on the front and back, open access to all ports and controls, interior wallet pockets for ID, cards, and cash, and a quick tab for sliding up the phone and exposing the rear camera and flash. Twelve South’s BookBook for iPhone 4 is available now and sells for $60.