Delve deeper into the world of Oz in this collection of books four through six in L. Frank Baum's classic American fairy tale series. In "Dorothy and the Wizard in Oz, " Dorothy and the Wizard visit the center of the Earth, where people are vegetables, glass houses grow, and Oz characters reappear. Eventually they return to the Emerald City--but will they stay? In "The Road to Oz, " Dorothy sets out on another adventure with some new friends like the Shaggy Man, Button-Bright, and Polychrome, and some old ones like the Scarecrow and the Tin Woodman. Will they reach the Emerald City in time for Ozma's birthday? In "The Emerald City of Oz, " Dorothy, her Uncle Henry, and Aunt Em are going to live in the Emerald City.