Ruth Plumly Thompson

The magic of Oz: A young citizen of Oz who learns an important magic word falls prey to the wickedness of the Nomes' ex-king who wants to destroy Dorothy, the Wizard, and Princess Ozma. Glinda of Oz: Dorothy's efforts to calm strife and avert war in a section of Oz by calling on Glinda's magical powers. The royal book of Oz: Scarecrow searches for his family tree and discovers that he's the Long Lost Emperor of the Silver Island.