Historian and biographer Helen Fry is the author (for Yale) of MI9: A History of the Secret Service for Escape and Evasion in World War Two (2020), The Walls Have Ears: The Greatest Intelligence Operations of World War II (2019), and The London Cage: The Secret History of Britain's WWII Interrogation Centre (2017). 

He books focus on intelligence, prisoners of war, and the social history of World War II. Helen undertakes consultancy work for documentary companies and appears frequently in TV interviews and documentaries, and has engaged in wider historical projects, including adult education and as ambassador for the Military Intelligence Museum.