John M. Barry is the author of four previous books: Rising Tide: The Great Mississippi Flood of 1927 and How It Changed Amer­ica; Power Plays: Politics, Football, and Other Blood Sports; The Transformed Cell: Unlocking the Mysteries of Cancer (cowritten with Steven Rosenberg); and The Ambition and the Power: A True Story of Washington. He lives in New Orleans and Wash­ington, D.C.