Evil exists. Evil walks the streets. And evil has spawned a diabolical new disciple in this white-knuckle thriller from New York Times bestselling author Tess Gerritsen. PECCAVI The Latin is scrawled in blood at the scene of a young woman's brutal murder: I HAVE SINNED. It's a chilling Christmas greeting for Boston medical examiner Maura Isles and Detective Jane Rizzoli, who swiftly link the vi...