The Furthest Station and The October Man by Ben Aaronvitch

The October Man
With this long new novella, bestselling author Ben Aaronovitch has crafted yet another wickedly funny and surprisingly affecting chapter in his beloved Rivers of London series. If you thought magic was confined to one country—think again. Trier: famous for wine, Romans and being Germany's oldest city. When a man is found dead with his body impossibly covered in a fungal rot, the local authorities know they are out of their depth. But fortunately this is Germany, where there are procedures for everything. Enter Tobias Winter, an investigator for the Abteilung KDA, the branch of the German Federal Criminal Police which handles the supernatural. His aim is to get in, deal with the problem, and get out with the minimum of fuss, personal danger and paperwork. Together with frighteningly enthusiastic local cop, Vanessa Sommer, he quickly links the first victim to a group of ordinary middle aged men whose novel approach to their mid-life crisis may have reawakened a bloody conflict from a previous century. As the rot spreads, literally, and the suspect list extends to people born before Frederick the Great, Tobias and Vanessa will need to find allies in some unexpected places. And to solve the case they'll have to unearth the secret magical history of a city that goes back two thousand years. Presuming that history doesn't kill them first.

The Furthest Station

There have been ghosts on the London Underground, sad, harmless spectres whose presence does little more than give a frisson to travelling and boost tourism. But now there's a rash of sightings on the Metropolitan Line and these ghosts are frightening, aggressive and seem to be looking for something. 

Enter PC Peter Grant junior member of the Metropolitan Police's Special Assessment unit a.k.a. The Folly a.k.a. the only police officers whose official duties include ghost hunting. Together with Jaget Kumar, his counterpart at the British Transport Police, he must brave the terrifying the crush of London's rush hour to find the source of the ghosts. 

Joined by Peter's wannabe wizard cousin, a preschool river god and Toby the ghost hunting dog their investigation takes a darker tone as they realise that a real person's life might just be on the line. 

And time is running out to save them. 

With this new novella, bestselling author Ben Aaronovitch has crafted yet another wickedly funny and surprisingly affecting chapter in his beloved Rivers of London series.