During Prince Pompadore of Pumperdink's eighteenth birthday celebration, his birthday cake explodes, revealing a magic scroll, a magic mirror, and a doorknob. The scroll warns the prince that if he doesn't wed a "proper princess" within seven days, his entire kingdom will disappear. The prince, along with the kingdom's wise elephant
Kabumpo, set off on an adventure to the Emerald City so Pompa can marry
Princess Ozma, the only "proper princess" the Elegant Elephant can think of as worthy of his prince. Meanwhile, Ruggedo the
Gnome King (Thompson "corrected" Baum's spelling of "Nome") finds Glegg's Box of Mixed Magic while tunnelling under the
Emerald City. He experiments with the magical items inside the box; after he brings a wooden doll, Peg Amy, to life, and makes Wag the rabbit the size of a man, Ruggedo turns himself into a giant. This means that Ozma's palace gets stuck on his head, and in a panic he runs off to
Ev with it. After many adventures in the strange lands of Rith Metic, the Illumi Nation, and the Soup Sea, Pompadore and Kabumpo arrive in the Emerald City to find Ozma missing. They set off to find her and eventually meet up with Wag and Peg Amy. The group reaches the edge of the Deadly Desert and is hijacked by the Runaway Country, a conscious, talking, mobile piece of land. It carries them over the desert to Ev. Eventually, Peg Amy is revealed to be the princess of Sun Top Mountain (she was turned into a tree by the evil magician J. Glegg when she refused to marry him, then Cap'n Bill took part of the tree and carved her into a wooden doll for Trot), regains her original human form, and Pompadore marries her. ==Reception==