Pearl Zane Grey, the master of the western, was an American author and dentist best known for his popular adventure novels and stories associated with the Western genre in literature and the arts. His novels and short stories have been adapted into 112 films, two television episodes, and a television series, Dick Powell's Zane Grey Theater.The Mysterious Rider is a novel full of romance and adventure. Rancher Bill Belllounds brought up Columbine as though she were his daughter. Out of affection for her foster father, Columbine agrees to marry his son Jack, who is a drunkard, gambler, coward, and thief. However, she really loves the cowboy, Wilson Moore. Then, the Mysterious Rider appears at the Belllounds ranch, a man of middle age, gentle, kindly, but so formidable a gun fighter. He will play a pivotal role in righting the wrongs in the story.