The Ultra Secret (1975, 1976) By F.W. Winterbotham
 
The story of how during World War II, the highest form of intelligence obtained from breaking the supposedly unbreakable machine ciphers was processed and distributed with complete security to Roosevelt, Churchill, and all the principal Chiefs of Staff and commanders in the field throughout the war.
 
Soft Cover (1975) and Hard Cover with Dust Jacket (1976) Options
199 Pages
In Good Condition