Zane Grey 
The Border Legion 

Joan Randle is orphaned on the Idaho frontier when her father is shot. She is raised by her uncle in a frontier town called Hartley, and is the focus of much attention because of her beauty. Jim Cleve is so in love that he sneaks up on Joan and declares his love with a stolen kiss. Joan rejects him, however, and Jim leaves town to become a miner/criminal/road agent. Joan, still too young to know her own mind, has regrets, however, and sets off to find him. That is the start of a wild adventure for Joan. She is kidnapped by outlaw Jack Kells, who also falls for Joan. But the two men are destined to meet. By that time, however, Joan's is torn by her feelings for the charismatic bandit leader Jack Kells, and her young love, Jim Cleve.