Just finished reading Agent Zigzag: A True Story of Nazi Espionage, Love, and Betrayal by Ben Macintyre.  Great book. It’s the real-life story of Edward Chapman, an English criminal, scoundrel, and very effective charmer, who became a double agent during World War II, nominally working for the German Abwehr, doubling for the British MI5, and constantly tripling for his own account.  In some ways, Chapman’s story is more improbable than a James Bond thriller, and Macintyre tells it well.