A Wolf in the Fold — David Robbins

A KILLER BORN
When it comes to taking lives, Lucius Stark is just about the meanest mongrel who ever aimed a gun in west Texas. For him, killing means making money, and if the price is right, he'll do the job. But even the hardest of men has a soft spot....

A KILLER BETRAYED
When Stark grows too fond of a woman he is hired to kill in a range war, his client shows his displeasure by shooting him in the back. Stark is saved by the Butcher family -- the very ranchers he was paid to eliminate. But when the Butchers end up slaughtered without mercy, Stark sets out to deliver his own brand of vengeance...free of charge.