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Author:Winterbotham, F.W. The Ultra Secret. Product Details The feel-good place to buy books. We may have grown, but our mission has never changed. In short, we care about people and the planet! In 2002, World of Books was founded on an ethos to do good, protect the planet, and support charities by enabling more goods to be reused.
It's about the amazing second world war secret that was kept for thirty years after that the allies had been decoding the enemies secret messages on their coding machines.
A wonderful overview of how breaking the Enigma code affected the 'running' of the war.
Stunning in how often and in such detail the messages were read and stunning in how some generals ignored this invaluable source of intelligence!
If you liked this try Welchman's Hut six story!