Secret Messages: Codebreaking and American Diplomacy, 1930–1945. Lawrence, KS: University Press of Kansas, <year>2000</year>..
A History of U.S. Communications Intelligence during World War II: Policy and Administration. Fort George G. Meade, MD: National Security Agency, Center for Cryptologic History, <year>1997</year>..
Official Secrets: What the Nazis Planned. What the British and Americans Knew. New York: Hill and Wang, <year>1998</year>..
"The Holocaust Revisited: A Retrospective Analysis of the Auschwitz-Birkenau Extermination Complex." Studies ..., and .