Most helpful positive review
2 of 2 people found the following review helpful
on 11 December 2013
Although there have been other books written about SIGINT concentrating on procedures and the development of British systems of interception and analysis, this book, adds to our understanding of the significance of SIGNIT through original interviews with German interceptors, British code breakers, and US and Russian cryptographers. Mr Matthew's book builds on the previous works, adding a unique perspective and refocuses attention on this essential part of intelligence history.