Grave Peril - Jim Butcher

Chicago's wizard-for-hire Harry Dresden faces the toughest foe of his career: the ghost of an evil wizard who invades people's nightmares, and who uses other ghosts as lethal weapons. Harry tries to figure out why so many victims have ties to him--and if he doesn't figure it out soon, he could wind up a ghost himself. Wizard for hire Harry Dresden gets mixed-up with the dead in this haunting, fantastical novel( Publishers Weekly ) in the #1 New York Times bestselling series. Harry Dresden's faced some pretty terrifying foes during his career. Giant scorpions. Oversexed vampires. Psychotic werewolves. It comes with the territory, when you're the only professional wizard in the Chicago area phone book. But in all Harry's years of supernatural sleuthing, he's never faced anything like this: the spirit world's gone postal. All over Chicago, ghosts are causing trouble--and not just of the door-slamming, boo-shouting variety. These ghosts are tormented, violent, and deadly. Someone--or some thing --is purposely stirring them up to wreak unearthly havoc. But why? And why do so many of the victims have ties to Harry? If Harry doesn't figure it out soon, he could wind up a ghost himself...