L. Frank Baum
7 audiobooks
Dorothy and the Wizard in Oz 
Glinda of Oz / In Which Are Related the Exciting Experiences of Princess Ozma of Oz, and Dorothy, in Their Hazardous Journey to the Home of the Flatheads, and to the Magic Isle of the Skeezers, and How They Were Rescued from Dire Peril by the Sorcery of Glinda the Good 
The Land of Oz 
The Marvelous Land of Oz 
The Road to Oz 
The Tin Woodman of Oz / A Faithful Story of the Astonishing Adventure Undertaken / by the Tin Woodman, assisted by Woot the Wanderer, the / Scarecrow of Oz, and Polychrome, the Rainbow's Daughter 
The Wonderful Wizard of Oz