Twice Through the Lines

The author was a German lawyer an intelligence official. During the war he was a conspirator in the plot to assassinate Hitler. The story of Otto John is utterly compelling and his involvement in the 20th of July 1944 plot, for which his brother was executed. After the plot failed, he fled to England and worked for the BBC. After the war he was involved in classifying German leaders as pro or anti Nazi for the Nuremberg Trials. His story from there on gets interesting. This would probably make an interesting movie.