From one of the country's most brilliant political commentators, the national bestselling author of Then Everything Changed , comes an extraordinary, thought-provoking look at John F. Kennedy's presidency - after November 22nd 1963. In Then Everything Changed , Jeff Greenfield created a 'riveting' ( The New York Times ), 'captivating' (Doris Kearns Goodwin) exploration of three modern political alternate histories. Based on memoirs, histories, oral...