Adaptations of The Wizard of Oz
"The Wonderful Wizard of Oz" is a 1900 children's novel written by American author L. Frank Baum. Since its first publication in 1900, it has been adapted many times: for film, television, theatre, books, comics, games, and other media.Many of the television programs cited in this list are not strict adaptions of "The Wizard of Oz"; rather, they have reinterpreted aspects of the book, such as characters and plot, to create sequels, prequels or side-plots, which are inspired by Baum's original text.
There are over 40 canonical Oz books, including 14 by Baum, all of which are considered "official" sequels or prequels to "The Wonderful Wizard of Oz". In addition, the following books use the Oz milieu as settings for their tales:Kevin Scott Collier. "The Wonderful Animated World of the Wizard of Oz: The Good, The Bad and The Ugly!" CreateSpace Independent Publishing Platform, 2018.
Copyright status of The Wizard of Oz and related works in the United States
Thompson did not renew the copyright on her last five canonical books: "The Wishing Horse of Oz", "Captain Salt in Oz", "Handy Mandy in Oz", "The Silver Princess in Oz", and "Ozoplaning with the Wizard of Oz". Thus, these books entered the public domain 28 years after publication, between 1963 and 1967.
Congress amended the copyright law in 1992 so there would subsequently be automatic renewals of copyright. Therefore, the copyright on Thompson's deutero-canonical books "Yankee in Oz" (published in 1972) and "The Enchanted Island of Oz" (published in 1976) will not expire until 2068 and 2072 respectively.