The Shack has finally made it to the big screen. The bestselling 2007 novel hit a crazy, successful streak in 2009, and by 2010 had sold over 7.2 million copies. Now it has reached the rare status of a novel with over 10 million in sales–unprecedented for any novelist, let alone a first-time author like Paul Young. Young drew on personal childhood pain when he crafted this short book that chronicles a man’s horrible loss…