
In Baum's final novel, Glinda of Oz (1920), Dorothy and Princess Ozma try to prevent a battle between the Skeezers and the Flatheads. The Emerald City of Oz (1910) finds Dorothy, Aunt Em, and Uncle Henry coming to Oz just as the wicked Nome King is plotting to conquer its people. The Wizard of Oz (1900) introduces Dorothy, who arrives from Kansas and meets the Scarecrow, the Tin Woodman, the Cowardly Lion, and a host of other characters.

But the film was based on only the first of fourteen books about Oz in which Baum developed his vision of a socialist paradise and which garnered an immense and loyal following. Most people are familiar with the land of Oz by way of the classic 1939 film.
