Tamara Harpster rated Charon: A Dragon at the Gate (The Four Lords of the Diamond, #3): 4 stars June 9, 2013 Public Jack L. Chalker: Charon: A Dragon at the Gate (The Four Lords of the Diamond, #3) (1982)Charon: A Dragon at the Gate (The Four Lords of the Diamond, #3) by Jack L. Chalker