The Royal Book of Oz (Illustrated‪)‬

90 illustrations, some color, some black-and-white. Story begun by L. Frank Baum, original author of the Oz series, and completed by Ruth Plumly Thompson, who went on to write dozens more Oz books.  In this story "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 series includes: 1 The Wizard of Oz,  2 The Land of Oz,  3 Ozma of Oz,  4 Dorothy and the Wizard in Oz,  5 The Road to Oz,  6 The Emerald City of Oz,  7 The Patchwork Girl of Oz,  8 Tik-Tok of Oz,  9 The Scarecrow of Oz, 10 Rinkitink in Oz, 11 The Lost Princess of Oz, 12 The Tin Woodman of Oz, 13 The Magic of Oz, 14 Glinda of Oz., and 15 The Royal Book of Oz.