Pearl Zane Grey (1872 –1939) 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; he idealized the American frontier. Riders of the Purple Sage (1912) was his best-selling book. Grey became one of the first millionaire authors. With his veracity and emotional intensity, he connected with millions of readers worldwide, during peacetime and war, and inspired many Western writers who followed him. Zane Grey was a major force in shaping the myths of the Old West; his books and stories were adapted into other media, such as film and TV productions.
He was the author of more than 90 books, some published posthumously and/or based on serials originally published in magazines. His total book sales exceed 40 million. Grey wrote not only Westerns, but two hunting books, six children's books, three baseball books, and eight fishing books. Many of them became bestsellers. It is estimated that he wrote more than nine million words in his career. From 1917 to 1926, Grey was in the top ten best-seller list nine times, which required sales of more than 100,000 copies each time. Even after his death, Harper had a stockpile of his manuscripts and continued to publish a new title each year until 1963. During the 1940s and afterward, as Grey's books were reprinted as paperbacks, his sales exploded.