Oh we're off to see the - wait, what the fuck is going on here? I know Oz is a weird place but this is just too much for me. I'm staying in Kansas this time.
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 Woodman of Oz
The Magic of Oz
...and...
Glinda of Oz
...all written by L. Frank Baum, the original author and all in the public domain (http://is.gd/hPRgMY). But they had to come up with their own crappy sequel anyway didn't they?