From the New York Times bestselling author of Moonbreaker comes the epic final Secret Histories adventure, where the Droods will take on the most unexpected of enemies: the inhabitants of the Nightside.

The Droods are all about control, making people do what they're told for the greater good. The Nightside is all about choice: good and bad and everything in between. The Droods want to make the world behave. The Nightside wants to party. They were never going to get along.

For centuries, ancient Pacts have kept the Droods out of the Nightside, but now the Droods see the Nightside as a threat to the whole world. They march into the long night, in their armour, to put it under their control. All too soon, the two sides are at war. It's Eddie Drood and Molly Metcalf against John Taylor and Shotgun Suzie. The Drood Sarjeant-at-Arms and their Armourer against Dead Boy and Razor Eddie. More groups join in: the London Knights, the Ghost Finders, the Spawn of Frankenstein, Shadows Fall, and the Soulhunters. Science and magic are running wild, there's blood running in the gutters, and the bodies are piling up.
    
Is anyone going to get out of this alive?