In 1900, Baum published The Wonderful Wizard of Oz, an instant classic that redefined American fairy tales. Its enormous popularity inspired thirteen sequels, including The Marvelous Land of Oz (1904), Ozma of Oz (1907), and The Emerald City of Oz (1910), making the series one of the most enduring franchises in children's literature.
Beyond Oz, Baum wrote prolifically under his own name and several pseudonyms. Notable works include The Life and Adventures of Santa Claus (1902), Mother Goose in Prose (1897), The Sea Fairies (1911), and Sky Island (1912). He also dabbled in journalism, theater, and early film production, adapting his Oz stories for the stage and screen.
Baum's imaginative worlds, memorable characters, and gentle humor have enchanted generations of readers, securing his legacy as a pioneering figure in American fantasy literature.