books by subject
History of Enigma Code in World War II
Enigma: The Battle For The Code (Cassell Military Paperbacks)
Colossus: Bletchley Park's Greatest Secret
The Secret Life of Bletchley Park: The History of the Wartime Codebreaking Centre by the Men and Women Who Were There
The Other Battle of the Bulge: Operation Northwind (Siegfried Line 7): The Spellmount Siegfried Line Series Volume Seven
The Bletchley Girls: War, secrecy, love and loss: the women of Bletchley Park tell their story (Extraordinary Lives, Extraordinary Stories of World War Two)
The Debs of Bletchley Park
Mussolini: The Secrets of His Death
A Grand Gossip: the Bletchley Park Diary of Basil Cottle, 1943-45
The Secrets of Station X: How the Bletchley Park codebreakers helped win the war (Dialogue Espionage Classics)