This is the tenth novel in Philip Kerr's Bernie Gunther series of detective novels. It's the first Philip Kerr novel I've read.
The thing which immediately distinguishes this series from just another "hard boiled" detective series (the jacket proudly proclaims that "Philip Kerr is the only bona fide heir to Raymond Chandler") is the setting of the books in Nazi Germany.
It did feel to me like the novel was somewhat padded and overlong. If it was about two hundred pages shorter, it would have been a five star novel. As it is, the Bad Catholic gives it three and a half Sherlock Holmes hats.