Dead Beat

Three days before Halloween, the vampire Mavra blackmails Harry Dresden into finding the Word of Kemmler, a lost book of necromancy, before his friend Karrin Murphy is framed for murder. Several rival necromancers are racing for the same book, each hoping to use it in a ritual that could raise an army of the dead.

With help from his half brother Thomas, the Wardens of the White Council, and his own hard won magic, Harry has three days to find the book, stop the ritual, and survive the deadliest case of his career. Dead Beat is the seventh novel in Jim Butcher's Dresden Files.