Twelve South ( has released its first accessory for iPhone 4 owners: the US$59.99 BookBook is a pocket-sized wallet that holds both iPhone 4 and your driver’s license, debit card, cash and receipts.

It replaces the need for a traditional wallet. The BookBook’s leather cover provides protection for the Phone. Open BookBook for edge-to-edge access to the Apple smartphone. All buttons and ports are accessible. You can sync or listen to iTunes while iPhone is in the book. Soft, chocolate brown suede lines the interior of the wallet.

BookBook features an ID window designed to make it easy to flash your license. The window has a thumb slide for quick removal of your ID when needed. There are two slots for credit/debit cards and a vertical pocket for cash, receipts or business cards.