Autowahn is a new adventure for London police officer Peter Grant, the star of the bestselling novel series Rivers of London by Ben Aaronovitch. Grant is part of a very special London police unit. As a full-time police officer and part-time magician, he deals with rather unusual cases—those involving magic and the general madness that permeates London to its very core. His latest case begins with a seemingly harmless car that suddenly develops a thirst for murder—without a driver. However, the case expands, involving the most sinister vehicle in England, some teenagers on ketamine, and an ancient wooden bench with a very dark past. Based on the bestselling novel series by Ben Aaronovitch.