Three years after the publication of The Marvelous Land of Oz and encouraged by young fans’ letters, L. Frank Baum once more returned to write about lands full of magic and wonder.

On a ship on her way to Australia for a holiday with Uncle Henry, Dorothy Gale gets tossed overboard during a storm. Washing ashore in a chicken-coop, Dorothy and her newfound friend, a hen she names Billina, embark on an exploration of the new land. After meeting old friends and making new ones, Dorothy joins the Princess Ozma of Oz on a mission to restore the royal family of Ev to their rightful place on the throne.

This is the first book in which it becomes clear that Baum intended to make Oz a series, and, like its predecessors, Ozma of Oz has been adapted to theater and film.