Ghost Town is a novel written by James Swallow. It was the first in the Sundowners book series and was first published in 2001.
Description[]
It's the American West of the 1800's, and in the heart of America's untamed new frontier lurks an evil force, the Faceless, awaiting its return to power. Only two men, warriors from two different cultures, can stand together to defeat the evil. Gabriel Tyler, a reckless gunslinger, and a Native-American shaman, Jonathan Fivehawk, meet when Gabriel, injured during a gun battle, stumbles into Jonathan's camp one night. Initially suspicious of each other, Fivehawk dresses Gabriel's wounds with his medicines and they realize they are both headed in the same direction: Stonetree, once a thriving frontier town, now a ghost town.