John P. Warren is a commentator and author of two presidential political thrillers: Turnover and TurnAround. He holds an undergraduate degree from Xavier University in Cincinnati and has done graduate work in business at the Wharton School. A veteran, he worked as a field investigator and manager for the US Office of Personnel Management, and cofounded the firm privatized from OPM’s investigative arm during the Clinton Administration. Retired from business in 2004, Warren has since served as trustee on a number of nonprofit boards. He and his wife reside in the midst of western Pennsylvania’s Amish community, where he continues to keep a curious eye on the American political scene.