David "Zeb" Cook is an American game designer best known for his work at TSR, Inc., where he was employed for over fifteen years. Cook grew up on a farm in Iowa where his father worked as a farmer and a college professor. In junior high school, Cook playing wargames such as Avalon Hill's Blitzkrieg and Afrika Korps. "I was primarily a wargamer, but there wasn't any role-playing available then," although in college, he was introduced to the Dungeons & Dragons role-playing game through the University of Iowa gaming club. Cook earned his B.A. in English (with a Theater minor) in 1977. He married his high school sweetheart, Helen, with whom he had one son, Ian. Cook became a high school teacher in Milligan, Nebraska, where his students gave him his nickname of "Zeb"; the name derives from his signature, which is dominated by a stroke resembling a 'Z'.