Jack Martin 
Arkansas Smith [EPUB ebook] 

Arkansas Smith: the name was legend. Once he had been a Texas Ranger, but now he was something else entirely. Some said he was an outlaw, a killer of men and fast draw. Others claimed he was a kind of special lawman, dispensing frontier justice across the West and bringing law to the lawless.
Arkansas Smith arrives in Red Rock looking for those who shot and left his friend for dead. He vows to leave no stone unturned in his quest to bring the gunmen to justice and, soon, those who go against him must face the legendary fast draw that helped tame the West.