Mr. DuVall is a television executive and veteran writer who is also co-author of the series companion book. For 16 years he has helped develop, market, executive-produce, and promote non-fiction television programming, with past clients including the Turner Broadcasting System, The Learning Channel, KCET/Los Angeles, the Colonial Williamsburg Foundation, The Christian Science Monitor,and over 30 other commercial television and non-profit organizations. Mr. DuVall was also vice president for program resources of WETA, Washington, D.C. and previously was director of corporate relations of the University of Chicago, the director of public affairs for several national business trade associations, and a counterintelligence officer in the U.S. Air Force. His writing includes speeches for presidential candidates in four national campaigns and poems and articles that have appeared in literary journals and major newspapers.