Ozma of Oz by L. Frank Baum [Wizard of Oz #3]

While traveling to Australia with her Uncle Henry, Dorothy is swept overboard with a hen named Billina. They land in Ev, a country across the desert from Oz, and, together with new-found mechanical friend Tik-Tok, they must save Ev's royal family from the evil Nome King. With Princess Ozma's help, they finally return to Oz.

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.

Lyman Frank Baum (1856-1919) was an American writer of children's books, including THE WONDERFUL WIZARD OF OZ and thirteen sequels.  In addition to his Oz books, Baum wrote dozens of other books and short stories, often set in mythical lands.