The Latin word 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 victim to controversial celebrity psychiatrist Joyce O’Donnell–Jane’s professional nemesis and member of a sinister cabal called the Mephisto Club. On top of Beacon Hill, the club’s acolytes devote themselves to the analysis of evil: Can it be explained by science? Does it hav…Show more