Ozma of Oz

Lyman Frank Baum

Ozma of Oz: A Record of Her Adventures with Dorothy Gale of Kansas, Billina the Yellow Hen, the Scarecrow, the Tin Woodman, the Cowardly Lion and the Hungry Tiger; Besides Other Good People Too Numerous to Mention Faithfully Recorded Herein, published on July 30, 1907, was the official third book of L. Frank Baum's Oz series.

It was the first in which Baum was clearly intending a series of Oz books.