Law of the Gun by Lewis B. Patten
Written by Lewis B Patten. For five years Owen Scobey had successfully hidden his past from young Matt. And during that troubled time he had grown to love the boy as he would have loved his own son. But with that love was fear - fear of the moment when Matt would find him out, when the boy's respect and love would turn to hate. Now a man from the past had appeared who threatened to expose Scobey if he would not head a cattle drive through Indian-infested country. There was little choice but to agree ...