∞ Twelve South offers BookBook for iPhone

Up to now, Apple peripheral maker Twelve South has offered devices for Macs and iPads, but the company is branching out into iPhone accessories as well with the introduction of BookBook for iPhone, a version of its book-looking case designed specifically for the iPhone 4. It costs $59.99.

[ad#Google Adsense 300×250 in story]BookBook for iPhone resembles a leatherbound book, but it’s actually a pocket-sized wallet that encases and protects your iPhone 4, and offers space for your driver’s license, debit or credit card, cash and receipts.

The BookBook provides edge-to-edge protection, and the leather case has been distressed to give it a worn, aged look like it just came off a dusty library bookshelf. No two are exactly alike, according to Twelve South.