J. G. Reeder is a shabby little man with red hair and weak eyes. However, his extraordinary mind is rapier sharp. Here are three thrilling episodes torn from his “Red Aces,” about a man who gambles high and lives in fear; “Kennedy the Con Man” reveals the impeccable mask stripped from a fiend, and finally, “The Case of Jo Attymer,” a thoroughly intriguing mystery involving murder on London's Thames.