Dorothy and the Wizard in Oz

Dorothy and the Wizard in Oz is the 4th book in the Oz series by L. Frank Baum. On her way back from Australia, Dorothy visits her cousin, Zeb, in California. They are soon swallowed up by an earthquake, along with Zeb's horse Jim and Dorothy's cat Eureka. The group soon meets up with the Wizard and all travel underground back to Oz.