Son of Tobias — Harold Lamb

The happy reunion between the families of George Tobias and Pat Flynn turns into disaster when young Philip Tobias witnesses the killing of his father. The only clue he has is the flame-red hair of the killer and the name 'Jim'. Following the law of his Indian mother's tribe, eighteen-year-old Philip sets out to avenge his father's death, but he loses his memory after being shot. With hardly a friend and struggling in a hostile land, what hope has Philip in his mission of revenge? All he knows is that he is fast with a gun...