The Lost King of Oz by Ruth Plumly Thompson is the 19th book in the Oz series, continuing the adventures in L. Frank Baum’s magical land. The story follows Mombi, the evil witch from The Marvelous Land of Oz, who is inadvertently brought back to life and sets out to find Pastoria, the rightful king of Oz. Alongside a cast of new and familiar characters, including Snip the button boy and a living bear rug named Belfaygor, the heroes embark on a quest filled with whimsy, humor, and danger, ultimately reinforcing themes of friendship, courage, and the triumph of good over evil.