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

The Day After Roswell

Historical Dictionary of Ian Fleming's World of Intelligence: Fact and Fiction

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

Historical Dictionary of International Intelligence: Edition 2

The End of Faith: Religion, Terror, and the Future of Reason

Historical Dictionary of Cold War Intelligence

The Main Enemy: The Inside Story of the CIA's Final Showdown with the KGB

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

The Girl with Seven Names: A North Korean Defector’s Story

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

This Is How They Tell Me the World Ends: Winner of the FT & McKinsey Business Book of the Year Award 2021

Churchill's Spy Files: MI5's Top-Secret Wartime Reports

Long Walk To Freedom: 'Essential reading' Barack Obama

MI6: British Secret Intelligence Service Operations, 1909–1945

Fear: Trump in the White House

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

Shadow Government: How the Secret Global Elite Is Using Surveillance Against You

Secret War: The Story of SOE, Britain's Wartime Sabotage Organisation

Worthy Fights: A Memoir of Leadership in War and Peace