9 of 9 people found the following review helpful
A book to accompay others on Enigma & Bletchley Park,
This review is from: The Secret Listeners: How the Y Service Intercepted the German Codes for Bletchley Park (Hardcover)
It gives an excellent background to the work of 'Y' Group operators whos efforts have been ignored up to now.
i would recommend it to anyone who has an interest in Enigma and the work of Bletchley Park.