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The M Room: Secret Listeners who Bugged the Nazis

As seen on PBS and Channel 4’s documentary Spying on Hitler's Army, this is the story of the German émigrés who fled Hitler’s regime and became secret listeners for British Intelligence during WW2.

Behind the walls of the M Room (M for 'miked') they bugged the conversations of over 10,000 German POWs, including 59 German generals at Trent Park in North London. Providing a detailed, oft humorous, insight into life of the generals in captivity, the book shows the farcical ‘stage-set’ in which they found themselves.

But against this backdrop, the secret listeners eavesdropped on military secrets, V1 & V2, atomic bomb, as well as admission of war crimes and terrible atrocities against Russians, Poles and Jews.

For over 60 years the secret listeners never spoke about their work, not even to their families. Many went to their grave bearing the secrets of the nation which had saved them from certain death. Thousands of transcripts were only declassified in 2004.


"A treasure-trove of revelations."

The Times

"The book breaks new ground in drawing attention to the role of Jewish personnel."

Professor David Cesarani

"Highlights the involvement of rank and file German troops in war atrocities."

Stephen Smith, executive director of the USC Shoah Foundation

"There are tens of thousands of pages of paper in these records and Fry is to be congratulated on creating a coherent and digestible narrative from them for the lay public."

ARRSE (Army Rumour Service)

"An interesting account of a little-known aspect of the War."

Association of Jewish Refugees Journal

Helen Fry Buy