On Christmas Eve, Boston Medical Examiner Maura Isles is summoned to the scene of a brutal killing and teams up with Detective Jane Rizzoli to investigate the victim's ties to a sinister cabal called the Mephisto Club, a group devoted to a study of evil in all its forms.

When monster-hunter Malcolm MacFarlane comes across the gruesome aftermath of a ritual murder in a London church, he enlists the help of magician-scribe Simon Archer and alchemist extraordinaire Kate Anstruther. Studying the macabre scene, they struggle to understand obscure clues in the ancient Egyptian hieroglyphics carved into the victim's heart-as well as bizarre mystical allusions to the romantic poetry of William Blake. One thing is clear: Some...