Es autor de obras como "Economic Diplomacy and the Origins of the Second World War. Germany, Britain, France, and Eastern Europe 1930-1939" (Princeton University Press, 1980), "Postmortem: New Evidence in the Case of Sacco and Vanzetti" (University of Massachusetts Press, 1985), escrito junto a William Young trata sobre el proceso contra los anarquistas Sacco y Vanzetti, "Politics and War: European Conflict from Philip II to Hitler by David Kaiser" (Harvard University Press, 1990), "Epic Season. The 1948 American League Pennant Race" (University of Massachusetts, 1998), "American Tragedy: Kennedy, Johnson, and the Origins of the Vietnam War" (Harvard University Press, 2000), "The Road to Dallas. The Assassination of John F. Kennedy" (Belknap/Harvard University Press, 2008), sobre el asesinato de Kennedy, o "No End Save Victory: How FDR Led the Nation into War" (2014), entre otras.