Churchill's German Army: The Germans who fought for Britain

Spymaster: The Man Who Saved MI6

The Walls Have Ears: The Greatest Intelligence Operation of World War II

Women in Intelligence: The Hidden History of Two World Wars

MI9: A History of the Secret Service for Escape and Evasion in World War Two

Why I Became an X Troop Commando: A Life of Colin Anson, the German who Fought for Churchill