(Winner of the 2010 Glass Key Award) The head of Copenhagen's cold cases squad, detective Carl Mørck is given a bottle containing an old and decayed message, written in blood. It is a cry for help from two young brothers, tied up in a boathouse by the sea. In this third entry in Jussi Adler-Olsen's internationally bestselling series, Mørck and his assistants Assad and Rose set out to discover what happened to the boys, and in the process, detect the handiwork of a serial killer who targets the adherents of fringe religions.
"Adler-Olsen's cast might seem like stock crime-fiction characters at first glance—the curmudgeonly detective, the flighty secretary, the suspiciously resourceful assistant—but in his hands they are unpredictable and entertaining. This series has enough twists to captivate contemporary mystery readers and enough substance and background to entertain readers with historical and literary tastes."—Library Journal (starred review)