Book cover of The Walls Have Ears: The Greatest Intelligence Operation of World War II by Helen Fryby Helen Fry
@DrHelenFry

A history of the elaborate and brilliantly sustained World War II intelligence operation by which Hitler’s generals were tricked into giving away vital Nazi secrets

“A great book.”—Michael Goodman, BBC History Magazine

“An astonishing story of wartime espionage.”—Robert Hutton, author of Agent Jack

At the outbreak of World War II, MI6 spymaster Thomas Kendrick arrived at the Tower of London to set up a top secret operation: German prisoners’ cells were to be bugged and listeners installed behind the walls to record and transcribe their private conversations. This mission proved so effective that it would go on to be set up at three further sites—and provide the Allies with crucial insight into new technology being developed by the Nazis.

Interview with the Author

Podcast Art of the History Extra PodcastHistory Extra
Secret listeners
10/10/19        30 min


Podcast art for Warfare podcastWarfare
Bugs, Spies and the Nazi Generals in Britain
7/7/21        23 min


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