Dorothy and the Wizard in Oz by L. Frank Baum
Dorothy and the Wizard in Oz is the fourth book set in the Land of Oz written by L. Frank Baum and illustrated by John R. Neill. It was published on June 18, 1908 and reunites Dorothy with the Wizard from The Wonderful Wizard of Oz.
Dorothy and her kitten, Eureka, is sent to visit her uncle in California - operator Hugson's Ranch. She strikes up an acquaintance with Hugson's son and her cousin, Zeb. Dorothy, Eureka, and Zeb are riding a horse buggy when an earthquake starts and opens a crevice beneath them, sending them hurtling into the bowels of the earth. They land in the land of the Mangaboos, vegetable people who blame the earthquake on Dorothy.
Although the book has "In Oz" in the title, Dorothy and the Wizard spend very little time actually in Oz, but it doesn't matter. This is another great installment in the Oz series.