Biographies:
* The Fated Years: 1917-1922 (1982): A biography of the American novelist F. Scott Fitzgerald.
* Angel in the Whirlwind: The Triumph of the American Spirit in the 1930s (1995): A social history of the American 1930s.
* The Wild Bunch: The Lives and Legends of the Younger Brothers (1981): A biography of the notorious outlaw gang.
* The Second Coming: The Life and Times of Henry Ford (1990): A biography of the iconic American industrialist.
* The Making of a President, 1960 (1972): An account of John F. Kennedy's presidential campaign.
Other works:
* The American Experiment: A History (1984): A comprehensive history of the United States.
* The Lost City of the Monkey God (2000): A popular account of the discovery of a lost ancient city in Honduras.
* The Encyclopedia of American History (1984): A comprehensive reference work.
This is not an exhaustive list of all his works, but it covers some of his most prominent and acclaimed publications.