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..
The Wiz (film)
The Wiz is a 1978 American musical adventure fantasy film produced by Universal Pictures and Motown Productions, and released by Universal Pictures on October 24, 1978. A reimagining of L. Frank Baum's classic 1900 children's novel "The Wonderful Wizard of Oz" featuring an all-black cast, the film was loosely adapted from the 1974 Broadway musical of the same name. It follows the adventures of Dorothy, a shy, twenty-four-year-old Harlem schoolteacher who finds herself magically transported to the urban fantasy Land of Oz, which resembles a dream version of New York City. Befriended by a Scarecrow, a Tin Man and a Cowardly Lion, she travels through the city to seek an audience with the mysterious Wiz, who they say is the only one powerful enough to send her home.