The Pale House Devil by Richard Kadrey

A gripping, snappy creature feature from the master of horror noir about two detectives one dead, one living hired by an embittered old landowner to banish a bloody cosmic monster from his ancestral home, perfect for fans of Cassandra Khaw, Charles Stross and Lucy A. Snyder. Ford and Neuland are paranormal mercenaries one living, one undead, one of them kills the undead, the other kills the living. When a job goes bad in New York, they head west to wait for the heat to cool down. There, a young woman named Tilda Rosenbloom hires them on behalf of wealthy landowner, Shepherd Mansfield, to track and kill a demon haunting a mansion in remote northern California. As Ford and Neuland investigate the creature they uncover a legacy of blood, sacrifice and slavery in the house.