Snake-eater By T. Kingfisher

Snake-Eater is a contemporary fantasy horror novel by T. Kingfisher. Selena leaves her life in the city behind and moves to a remote desert town to live in her late aunt’s house, bringing only a few belongings and her beloved dog, Copper.

Quartz Creek initially seems strange but welcoming, until Selena discovers evidence that an ancient desert god known as Snake-Eater has a claim on the house and on her family. As Selena investigates her aunt’s journals and the history of the area, the god’s interest in her becomes increasingly sinister.