L. Frank Baum 
Oz Omnibus 

The Wonderful Wizard of Oz

The Marvelous Land of Oz

Ozma of Oz

Dorothy and the Wizard in Oz

The Road to Oz

The Emerald City of Oz

The Patchwork Girl of Oz

Tik-Tok of Oz

The Scarecrow of Oz

Rinkitink in Oz

The Lost Princess of Oz

The Tin Woodsman of Oz

The Magic of Oz

Glinda of Oz

Little Wizard Stories of Oz