May Flowers--Phillip Kerr's March Violets

March Violets is the first book in Kerr's "Berlin Noir" trilogy featuring the detective Bernie Gunther.  the story takes place during the 1936 Berlin Olympics and the backdrop of the mystery is seething with anti-Semitism and the consolidation of Hitler's power. ("March violets" was a term used to describe late-comers to the Nazi Party.) If you're a fan of historical mysteries, you owe it to yourself to check out Kerr's books.