South Carolina-based accessory maker Twelve South has introduced a new version of its popular BookBook MacBook case called the Rutledge. Though it has the same basic design as previous BookBook for MacBook cases, the company is proud of a new leather coloring technique that it developed that involves adding and removing color multiple times to enhance the natural look of the leather. It's so unique that the company's leather expert didn't think it could be done when they began developing the process. Also new is a case specifically designed for the 13" MacBook Pro with Retina Display, which is 7% smaller than it's non-Retina brother. Twelve South is introducing a new version of the classic BookBook to fit that machine as well.