Tapping Hitler's Generals: Transcripts of Secret Conversations, 1942-1945

Between 1942 and 1945, MI-19, a division of the British Directorate of Military Intelligence, created a number of Combined Services Detailed Interrogation Centres in and around London. The most important of these centers was at Trent Park, in North London. Sophisticated tapping equipment was installed, and secret gramophone recordings were made of conversations between German general staff officers.

In these transcripts, the officers reflect on how they thought the war was progressing, and the direction of German politics and strategy. The officers discussed the July Plot of 1944, the failed attempt to assassinate Hitler, collaboration with the enemy, and their experience of German war crimes. The editor has written biographies of all of the officers who appear in the transcripts, and has meticulously researched the validity of their assertions.

Tapping Hitlers Generals also tells the extraordinary background and details of the surveillance operation. One tactic for acquiring information involved mixing up Wehrmacht and Luftwaffe officers in order to elicit more detailed explanations of events and technologies. German stool pigeons were used to stir up debate, and a bogus welfare officer named Lord Aberfeldy acted as an undercover interpreter.