Definitely Dead is a romance/mystery/horror novel from 2006, the sixth in the Sookie Stackhouse series of novels by Charlaine Harris (which is the basis of the HBO show True Blood). The previous books are all reviewed here earlier on the Diabolical Plots feed.
Sookie heads to New Orleans to sort out of the affairs of her cousin Hadley who had been turned into a vampire and then killed. Hadley’s apartment has been placed under a stasis spell placed on it by Hadley’s landlord, the witch Amelia Broadway. Shortly after the spell is lifted, a newly-made vampire (the werewolf Jake Purifoy) rises within the apartment and attacks them. Sookie’s new boyfriend, the weretiger Quinn, is also in New Orleans on business, so he helps with the investigation. With the help of Amelia and her coven of witches they set out to discover how Jake came to be newly raised in that apartment on the same day that Hadley died.