Professor of History, American University
Ph.D., Harvard University, 1975
(Ed., with Norman Goda, Timothy Naftali, and Robert Wolfe) U.S. Intelligence and the Nazis. Washington, DC: National Archives and Records Administration, 2004.
Official Secrets: What the Nazis Planned, What the British and Americans Knew.
New York: Hill and Wang Publishers, 1998.
The Architect of Genocide: Himmler and the Final Solution. New York: Knopf, 1991.
(With Alan Kraut) American Refugee Policy and European Jewry, 1933-1945. Bloomington, IN: Indiana University Press, 1987.
(With Walter Laqueur) Breaking the Silence. New York: Simon & Schuster, 1986.
German Socialism and Weimar Democracy. Chapel Hill, NC: University of North Carolina Press, 1981.