The Rustlers of Pacos County by Zane Grey - Zane Grey  became especially interested in the West in 1907, after joining a friend on an expedition to trap mountain lions in Arizona. Grey wrote steadily, but it was only in 1910, and after considerable efforts by his wife, that his first western, Heritage of the Desert, became a bestseller. It propelled a career churning out popular novels about manifest destiny and the "conquest of the Wild West." Two years later he produced his best-known book, Riders of the Purple Sage (1912). He formed his own motion picture company, but in a few years sold it to Jesse Lasky who was a partner of the founder of Paramount Pictures. Paramount would make a number of movies based on his writings.   The Rustlers of Pacos County by Zane Grey - It is also speculated that two of his creations, Lone Star Ranger (a novel later turned into a 1930 film) and King of the Royal Mounted (popular as a series of big little books and comics, later turned into a 1936 film), were later used as an inspiration for two radio series by George Trendle (WXYZ, Detroit) which later made the transition to television - The Lone Ranger and Challenge of the Yukon (Sgt. Preston of the Yukon on TV).