“The Lady from Zagreb” is Philip Kerr’s 10th Bernie Gunther novel, and if you’re already a fan, that should be enough to send you scurrying to your bookstore. If you’re not a fan, maybe you should take a look, because this is one of the finest series in progress. Bernie started as a Berlin cop in the 1930s, but by the time this story unfolds, in 1943, he is reluctantly working as an investigator for the Nazis; he despises them but can never quite escape them.