The Secret Listeners: How the Wartime y Service Intercepted the Secret German Codes for Bletchley ParkHardcover, 1 June 2013

'The Secret Listeners' tells the story of the usually very young men and women who were sent to farflung outposts to locate and monitor endless streams of radio traffic around the clock and transcribe its Morse code at a speed few have ever managed since. Without them, the Allies would have learnt nothing of the enemy's military intentions.