The Lone Star Ranger is a Western novel published by Zane Grey in 1915. It follows the life of Buck Duane, a man who becomes an outlaw and then redeems himself in the eyes of the law. The novel is a story of Texas in the period of the Seventies. After killing a man in self defense, Buck Duane becomes an outlaw, a companion of the gunfighters and rustlers who live along the Texas border. In a camp on the Mexican side of the river, he finds a young girl held prisoner, and in attempting to rescue her, brings down upon himself the wrath of her captors and henceforth is forced to live a lonely life hunted on one side by honest men, on the other by outlaws. The novel was adapted four times to film under the same title as the novel.