The company has Twelve South for sale a new case for iPhone 4 named BookBook and could be called colloquially as the portfolio to bring to your Apple and all your cards which can be an advantage or a disadvantage as look (I say so greedy that it is an accessory of this kind for the foreign friends).
To protect the iPhone BookBook cover features a pair of hard plastic plates that have been lined to simulate the appearance of an old book when the cover is completely closed. Once we open the cover will have access to all of our cards, ID, and all buttons and ports on the iPhone.
Finally, note that this case is only available for the iPhone 4 at a price of $ 59.99. You have more information on the official website of the manufacturer.