Moist von Lipwig was a con artist and a fraud and a man faced with a life choice: be hanged, or put Ankh Morpork's ailing postal service back on its feet. It was a tough decision. But he's got to see that the mail gets though, come rain, hail, sleet, dogs, the Post Office Workers Friendly and Benevolent Society, the evil chairman of the Grand Trunk Semaphore Company, and a midnight killer.