In L. Frank Baum's final Oz book, Princess Ozma, accompanied by Dorothy, embarks on a diplomatic mission to prevent war between two isolated and hostile communities: the brain-stealing Flatheads and the clever Skeezers living in a submerged glass dome. When Ozma and Dorothy become trapped by the Skeezers, the wise and powerful sorceress Glinda the Good must utilize her vast magical knowledge and resources, including her Great Book of Records, to devise a rescue and bring peace to these warring factions. The story highlights themes of conflict resolution, the dangers of prejudice born from isolation, leadership, and problem-solving, showcasing Glinda's significant power and wisdom in maintaining harmony within Oz.