William Wallace Denslow [May 5, 1856-May 27, 1915] illustrated the book The Wizard of Oz, and worked on the sets for the 1902-1903 stage version. But there was a disagreement over royalties between him, and author and Oz series originator Lyman Frank Baum [May 15, 1856-May 5, 1919]. Baum wrote 13 more books in the Oz series. But he had them all illustrated by John Rea Neill [November 12, 1877-September 13, 1943].