Wonderful Wizard of Oz, The

Series : Book 1 of (officially) 14

Genre : Children’s Fiction, Fantasy

Overview :

Dorothy Gale, a girl from Kansas, gets swept into the Land of Oz by a cyclone. She meets a living Scarecrow, a man made entirely of tin, and a Cowardly Lion while trying to get to the Emerald City hoping that the the Great Oz can help her return home to Kansas. Oz commands them to destroy the Wicked Witch of the West, which they do, but when they return they discover that the Wizard is a humbug. Dorothy and her friends travel to Glinda, the Good Witch of the South, and she finally is able to help Dorothy get home. (from the Wiard of Oz wiki)

This book is now in the public domain and is available from the following locations.
Project Gutenberg, Oz wiki, LibriVox, LibriVox zipped mp3 64kb-entire book.
Also try, manybooks.net and at feedbooks, both offer a variety of ebook formats including mobipocket, kindle, pdf, html and Microsoft reader to name some of the more popular options.