The Walls Have Ears: The Greatest Intelligence Operation of World War II (Unabridged)
2019
Women in Intelligence : The Hidden History of Two World Wars
2024
MI9: A History of the Secret Service for Escape and Evasion in World War Two
2021
Spymaster : The Man Who Saved MI6
2021
Churchill's German Army : The Germans who fought for Britain
2021
Spies in History: From the Ancient World to the Silver Screen
2025