The Oz Books - Complete Series collection includes:

    The Wonderful Wizard of Oz
    The Marvelous Land of Oz
    Ozma of Oz
    Dorothy and the Wizard of 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 Woodman of Oz
    The Magic of Oz
    Glinda of Oz