Deathwish - Rob Thurman - Bog

Half-human Cal Leandros and his brother, Niko, are barely getting by with their preternatural detective agency when vampire Seamus hires them. He's being followed and he wants to know by whom. But the Leandros brothers have to do more than they had planned when Seamus turns up dead. Worse still is the return of Cal's nightmarish family, the Auphe.