British cryptographers at Bletchley Park decrypted some German air force messages, Group Captain Frederick Winterbotham recognized the potential of such intelligence and established a secure system to handle it. Winterbotham's units played a critical role in key moments during the war. This is Winterbotham’s first-hand account of the Enigma program.
For my fellow research nerds and academics this is a primary source! We love a good primary source. If you know me, I’m fascinated by intelligence work especially during the second World War, women often got to shine. This is a great account of the works that was going on at Bletchley.
Thank you NetGalley & Frontline Books for an advanced reader copy. #TheUltraSecret #NetGalley

This book by Group Captain Winterbotham was first published in 1974 and provided the detail of how the highly classified decrypted signals sent by the Germans during WWII and dubbed Top Secret Ultra or just Ultra, were used. Even after 50 years the book reveals to modern generations the details of some of the highly publicised battles of that conflict were orchestrated by the Allies, in such a way that the enemy did not realise that their codes had been broken.
Much has been written and filmed about the code breakers of Bletchley Park but this book takes us to the employment and application of the Ultra signals and message content.
Winterbotham concludes that the War's outcome "was, in fact, a very narrow shave, and the reader may like to ponder [...] whether or not we might have won had we not had Ultra"

A fascinating book that enhances our understanding of the major operations conducted during WWII and of the man who was responsible for managing the Ultra information.

I have read a considerable amount about this topic, but this book must be one of the tops I have read. Anyone who is interested in this topic will love this book.