Hitler's Nest of Vipers: The Rise Of The Abwehr

Hitler's Trojan Horse: The Fall of the Abwehr, 1943–1945

Historical Dictionary of World War II Intelligence

Historical Dictionary of World War II Intelligence

Soviet and Nazi Defectors: Counter-Intelligence in WW2 and the Cold War

Historical Dictionary of Cold War Intelligence

Historical Dictionary of Cold War Intelligence

Soviet and Nazi Defectors: Counter-Intelligence in WW2 and the Cold War

Double Cross in Cairo: The True Story of the Spy Who Turned the Tide of War in the Middle East

Historical Dictionary of World War I Intelligence

Codeword Overlord: Axis Espionage and the D-Day Landings

Historical Dictionary of Signals Intelligence

Historical Dictionary of World War I Intelligence

Historical Dictionary of Signals Intelligence

The A to Z of British Intelligence

MI6: British Secret Intelligence Service Operations, 1909–1945

The A to Z of British Intelligence

The A to Z of Sexspionage

Historical Dictionary of Sexspionage

The A to Z of Sexspionage