Blood Line — William M. James

Cuchillo Oro saved Linda Daughton from a fate worse than death at the hands of a band of renegade Apaches. When he was in danger himself, she returned the favour by shooting his attacker in the groin. Though the fight is over - the trouble is just beginning. Now Frankie Ettinger was out for revenge. But it would take more than a white man, even the rich and ruthless Ettinger, to spill the blood of Cuchillo Oro. And he will settle for nothing less than spilling the blood of any white man who dares to cross his trail ...