Copyright status of The Wizard of Oz and related works in the United States
"The Wonderful Wizard of Oz" was published in 1900, and was the first to enter the public domain in "1956". This allowed Reilly & Lee, the publisher of all the other Oz books (as well as Baum's other books) to issue their own edition of "The Wizard of Oz", which had previously been published by George M. Hill Company and later by the Bobbs Merill Company after Hill went bankrupt..
Wicked (Maguire novel)
Wicked: The Life and Times of the Wicked Witch of the West is a novel published in 1995 written by Gregory Maguire and illustrated by Douglas Smith. It is a revisionist exploration of the characters and land of Oz from L. Frank Baum's 1900 novel "The Wonderful Wizard of Oz", its sequels, and the 1939 film adaption "The Wizard of Oz". Unlike the popular 1939 movie and Baum's writings, this novel is not for children; it contains adult language and content, including violent imagery and sexual situations. The novel presents events, characters and situations from Baum's books and the film in new ways, making numerous alterations.