The Special Assessment Unit: a small and rather unique department of London’s Metropolitan Police. Small in that it has only two active members, and unique because the crimes it investigates are somewhat unusual in nature. Some might say paranormal. Others might call them supernatural. Either way, they usually involve magic.The SAU’s newest (and second) member, PC Peter Grant, is not just a trainee wizard, but also an ambitious member of the Met, and he’s currently being interviewed as part of the rigorous screening he must undergo to become a police detective.Self-contained magical crimes, as recounted by Detective Peter Grant to his superiors, as he takes the Detective exam. If you’ve ever wanted to try the mysterious world of Rivers of London, this is the perfect opportunity to get on board!An all-new series of Rivers of London short stories by Ben Aaronovitch and Andrew Cartmel. Set between ‘The Hanging Tree’ and ‘Black Mould’.