Field Grey by Philip Kerr

Summary

Courtesy of Adolf Hitler, Bernie Gunther had a mixed sort of life. Before the war broke out he had been Inspector Gunther in the German police, which is when he saved the skin of Mielke, a German communist, and befriended Elisabeth. Then he had been made an SS Officer. Seen action, if you could call executing prisoners action. He didn't enjoy being a POW of the Russians or the mess he got into when he uncovered a killer among inmates of a labour camp. He’d preferred his time in occupied Paris, even though that was where his life had been most at risk, only saved by a pretty young woman.

Gunther made Cuba his home after the war. No-one there was concerned about his past. That was not until 1954, when he was landed with a refugee from among the Cuban revolutionaries. Delivered into the hands of the American Navy at Guantanamo, he was passed over to the CIA. Berlin was still a divided city and his past did matter to them.