"A marvelous highbrow thriller." - C J SansomThis is an electrifying historical thriller - a journey into the dark streets of Prussia where a deadly serial killer has a city at his mercy. It's the beginning of the eighteenth century, and Prussian magistrate Hanno Stiffeniis has been called to investigate a spate of murders which has reduced Konigsberg to a state of terror. Four people have died, and there is no sign of an end to the killing spree. When the killer tries to murder him, the magistrate finds himself confronted by the demons of his own past. Therein lies the sinister source of those murders, and the true reason he has been enticed back to Konigsberg...