
John Rea Neill was a magazine and children's book illustrator primarily known for illustrating more than thirty books set in the Land of Oz. Those books include all but one of those written by L. Frank Baum, as well as those written by Ruth Plumly Thompson, and three that Neill himself wrote. He also illustrated other books, and magazine and newspaper stories.
Excerpt from Wikipedia, available under CC BY-SA 4.0.

Dorothy and the Wizard in Oz
2011
ISBN 9781617204906
The Magic of Oz
2017
ISBN 9780649080748
The Story of Little Black Sambo
2020
ISBN 9789354023972
Ozma of Oz
1998
ISBN 9781891595165
The Patchwork Girl of Oz. By L. Frank Baum and John R. Neill ( Children's NOVEL ) (Illustrated)
2017
ISBN 9781542939744
The Lost Princess of Oz
2015
ISBN 9781341613661