Most Popular Books
- The Pope's Soldiers: A Military History of the Modern Vatican
- Spies in the Vatican: Espionage & Intrigue from Napoleon to the Holocaust (Modern War Studies)
- Nothing Sacred: Nazi Espionage Against the Vatican, 1939-1945 (Cass Series : Studies in Intelligence)
- Secret Messages: Codebreaking and American Diplomacy, 1930-1945 (Modern War Studies)
- Spying Through a Glass Darkly: American Espionage Against the Soviet Union, 1945 - 1946
Series By David Alvarez