Rivers of London
This is certainly a crime novel with a difference, and great fun.
The main protagonist is a young constable who becomes a trainee wizard, and gets involved in a case in which the river gods of London are at war, and a malicious vengeful spirit takes ordinary Londoners and twists them into grotesque mannequins to act out its drama of violence and despair.
As well as the fantasy, there is a lot of police procedural. This is the first in a series of what has become a cult classic.