Kendare Blake. Anna Dressed in Blood - 2011

Cas Lowood, armed with his late father's athame knife, kills ghosts. In Thunder Bay, Anna, forever 16, drips blood on her white dress from throat slit in 1958, and rips apart anyone who enters her house - except Cas. He makes new friends - high school queen Carmel, jock Will, admiring nerd Thomas and Tom's voodoo grandpa Morfran - to fight this demon