At Her Majestys Secret Service: The Chiefs of Britains Intelligence Service, MI6

Churchill's Ministry of Ungentlemanly Warfare: The Mavericks who Plotted Hitler's Defeat

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

Historical Dictionary of British Intelligence: Edition 2

The Quest for Queen Mary

Encyclopedia of Political Assassinations

Fake History: 101 Things that Never Happened

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

Amritsar 1919: An Empire of Fear & the Making of a Massacre

Cold War Spymaster: The Legacy of Guy Liddell, Deputy Director of MI5

Spearhead: An American Tank Gunner, His Enemy and a Collision of Lives in World War II

Spies Who Changed History: The Greatest Spies & Agents of the 20th Century

Spycraft Secrets: An Espionage A-Z

The Splendid and the Vile: A Saga of Churchill, Family, and Defiance During the Blitz

Historical Dictionary of Signals Intelligence

Happy Odyssey

The A to Z of British Intelligence