itch.io

I think you should add the "Oz books", but just the ones Frank L. Baum wrote.

Here's a list:

1. The Wonderful Wizard of Oz (1900)
2. The Marvellous Land of Oz (1904)
3. Queer Visitors from the Marvelous Land of Oz (1904-05)
4. The Woggle-Bug Book: The Strange Adventure of the Woggle-Bug (1905)
5. Ozma of Oz (1907)
6. Dorothy and the Wizard in Oz (1908)
7. The Road to Oz (1909)
8. The Emerald City of Oz (1910)
9. The Patchwork Girl of Oz (1913)
10. Little Wizard Stories of Oz (1913)
11. Tik-Tok of Oz (1914)
12. The Scarecrow of Oz (1915)
13. Rinkitink in Oz (1916)
14. The Lost Princess of Oz (1917)
15. The Tin Woodman of Oz (1918)
16. The Magic of Oz (1919)
17. Glinda of Oz (1920)
18. The Littlest Giant: An Oz Story (Written 1917; Published 1972)