James Reasoner 
Death Head Crossing [EPUB ebook] 

The Texas Two Step.  .  .
Death-Head Crossing is just the name of a little town in Texas–until the population starts shrinking one body at a time. But the deaths are as mysterious as the face of the murderer, and only gunslinger Hell Jackson has what it takes to ride through the reign of terror and put an end to the killings…
.  .  .Takes A Deadly Turn
Jackson also gets an unwanted partner: Everett Sidney Howard, a cub reporter from New York City looking to make a name for himself riding alongside a famous gunman. Together the two face a gauntlet of dangers from rustlers, night riders, and more unexpected foes, as they close in on a murderous gang that’ll stop at nothing to get what they want.