The Walls Have Ears by Helen Fry

https://thebookvoice.com/podcasts/2/audible/223439 to listen full audiobooks. Title: The Walls Have Ears Author: Helen Fry Narrator: Jean Gilpin Format: mp3 Length: 11 hrs and 41 mins Release date: 09-24-19 Ratings: 4.5 out of 5 stars, 36 ratings Genres: Intelligence & Espionage Publisher's Summary: 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. In this astonishing history, Helen Fry uncovers the inner workings of the bugging operation.