Peter Grant Series by Ben Aaronovitch: Rivers of London, Moon over Soho & Whispers Under Ground

The novel centres around the adventures of Peter Grant, a young officer in the Metropolitan Police; who, following an unexpected encounter with a ghost, is recruited into the small branch of the Met that deals with magic and the supernatural.
Peter Grant, having become the first English apprentice wizard in fifty years, must immediately deal with two different but ultimately inter-related cases. In one he must find what is possessing ordinary people and turning them into vicious killers, and in the second he must broker a peace between the two warring gods of the River Thames.

Prossimo episodio

S01E180 - The Casual Vacancy by J.K. Rowling