Bernie Gunther (abridged)7 books in series
The One from the Other Summary
Ex-SS cop and Russian POW Bernie Gunther is making his way back to Munich in 1949 to resurrect his career as a PI. Amid the chaos of defeat, Munich's a place of dirty deals, rampant greed, fleeing war criminals, and all the backstabbing intrigue that prospers in the aftermath of war. It's also a place where a private eye can find a lot of not quite reputable work.
A woman seeks him out. Her husband has disappeared. She's not looking to get him back - he's a wanted man who ran one of the most vicious concentration camps in Poland. She just wants confirmation that he's dead.
It's a simple enough job. But in post-war Germany, nothing is simple.