The Royal Book of Oz

The original introduction claimed that the book was based on notes by Baum, but this has been disproved. Frank Baum's death. Even if genuine, they bear no resemblance to Thompson's book. Beginning in the 1980s, some editions have correctly credited Thompson,[1] although the cover of the 2001 edition by Dover Publications credits only Baum. Baum's surviving notes, known as "An Oz Book" [2] are known from four typewritten pages found at his publisher's, but their authenticity as Baum's work has been disputed. The Royal Book of Oz (1921) is the fifteenth in the series of Oz books, and the first by Ruth Plumly Thompson, to be written after L. Although Baum was credited as the author, it was written entirely by Thompson.