The Royal Book of Oz: In which the Scarecrow goes to search for his family tree and discovers that he is the Long Lost Emperor of the Silver Island, and how he was rescued and brought back to Oz by Dorothy and the Cowardly Lion (The Oz Series Book 15)

312 pp. 8vo. Red cloth, black titles, vignette on spine, illustrated endpapers, black-and-white illustrations by John R. Neill. The first of the many Oz books written by Baum's first successor, Ruth Plumly Thompson, though it was credited by the publisher to Baum on the spine and cover "to ease the transition to the new Royal Historian."