The  royal book of Oz
Subtitle: 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.
By: By L. Frank Baum ... Enl. and ed. by Ruth Plumly Thompson. Illustrated by John R, Neill
Contributors: Thompson, Ruth Plumly, 1893-; Neill, John R.
Publisher: The Reilly & Lee co.
Published: 1921
Place of publication: Chicago
Language: eng
Number of pages: 312
Description: The Scarecrow discovers he in the Emperor of Silver Island after hunting for his ancestors. But Dorothy and her friends must rescue him before he undergoes a terrible enchantment.
Notes: First edition

This title actually written by Thompson after Baum's death

Illustrated lining-papers

Bound in gray cloth with full-page color illustrated title label pasted down; edges stained yellow

Publisher's story about all the Oz books on p. 305-312

King Collection copy with name and address penciled in on printed ownership plate; several illustrations carefully colored in