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

The Art of War

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

Bruce Lee Striking Thoughts: Bruce Lee's Wisdom for Daily Living

Historical Dictionary of World War I Intelligence

The Complete Book of Five Rings

Historical Dictionary of World War II Intelligence

Nuclear War: The bestselling non-fiction thriller, shortlisted for the Baillie Gifford Prize 2024

Mask: MI5's Penetration of the Communist Party of Great Britain

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

Codeword Overlord: Axis Espionage and the D-Day Landings

Kendo: A Comprehensive Guide to Japanese Swordsmanship

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

The Book of Five Rings: A Classic Text on the Japanese Way of the Sword

Historical Dictionary of Sexspionage

MI5: British Security Service Operations, 1909–1945: The True Story of the Most Secret counter-espionage Organisation in the World