The Night Silver River Run Red (Splatter Western) by Christine Morgan (Book 4 of 8)

1879: An unknown and timeless evil descends on East Texas. James Dee, bestowed with knowledge from beyond, moves through time and space, pursuing age-old horrors and ending their reign. As he seeks the hidden town of Dust to continue his lifework, another is hot on his heels, and will stop at nothing to rip the divine knowledge from Dee. As these opposing forces collide, Dee becomes both hero and villian in his quest against the Elders. He doesn't have time to be sorry--THERE ARE GODS TO KILL

(All Splatter Western books are stand-alone stories. Read them in whatever order you please!)