Top Secret Ultra: Breaking Luftwaffe Ciphers at Bletchley Park

by Peter Calvocoressi

Shortly after the outbreak of the Second World War, a young Peter Calvocoressi was serving in the Ministry of Economic Warfare, his role largely consisting of reviewing shipping manifests day in day out. In 1940, he decided to volunteer for the War Office but was turned away on account of a recently-sustained head injury. The note on his file? "No good for anything - not even intelligence." In spite of this, Calvocoressi was able to apply to the Air...

• Format: Paperback
• Language: English
• ISBN: 1805001256
• ISBN13: 9781805001256
• Release Date: May 2025
• Publisher: Greenhill Books
• Length: 256 Pages