Ruth Plumly Thompson
Ruth Plumly Thompson (27 July 1891 – 6 April 1976) was an American writer of children's stories, best known for writing many novels placed in Oz, the fictional land of L. Frank Baum's classic children's novel *The Wonderful Wizard of Oz* and its sequels.
Books
The Royal Book of Oz
1921
ISBN 9798512466674
Kabumpo in Oz
1922
ISBN 9781978221840
The cowardly lion of Oz
1923
ISBN 9780613954297
Jack Pumpkinhead of Oz
1929
ISBN 9780345323606
The yellow knight of Oz
1930
ISBN 9780345328670
Ojo in Oz
1933
ISBN 9780613975766
The Silver Princess in Oz
1938
ISBN 9789993932840
Ozoplaning with the Wizard of Oz
1939
ISBN 9781979307970
Who's who in Oz
1954
ISBN 9780872261884
The princess of Cozytown
1922
ISBN 9781656994011
Grampa in Oz
1924
ISBN 9780613986199
The Lost King of Oz
1925
ISBN 9783985314003
The Hungry Tiger of Oz
1926
ISBN 9798886000429
Gnome King of Oz (Histories of King Kelson)
1927
ISBN 9780345323583
The Giant Horse of Oz
1928
ISBN 9780345323590
Pirates in Oz
1931
ISBN 9780345330994
The Purple Prince of Oz
1932
ISBN 9780345328694
Speedy in Oz
1934
ISBN 9780345337054
The Wishing Horse of Oz
1935
ISBN 9780613986243
Captain Salt in Oz
1936
ISBN 9783985313952
Handy Mandy in Oz
1937
ISBN 9781695507142- No cover
The Royal Book of Oz Illustrated
2021
ISBN 9798711048626 
The Gnome King of Oz
The Enchanted Land of Oz