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..
Eric Shanower
He wrote adaptations of L. Frank Baum's first six original Oz novels for Marvel Comics, illustrated by artist Skottie Young. The first, "The Wonderful Wizard of Oz" was released in a hardcover collection on September 2, 2009. The follow-up, "The Marvelous Land of Oz" began in November 2009 as an 8 issue monthly comic series, while the third mini i.e. "Ozma of Oz" began in November 2010. The fourth and fifth books, "Dorothy and the Wizard in Oz" and "The Road to Oz", were also subsequently adapted by Shanower and Young for Marvel Illustrated. The collaboration concluded with their adaptation of the sixth book, "The Emerald City of Oz".