Who illustrated the books?
The Wonderful Wizard of Oz was originally illustrated by W. W. (William Wallace) Denslow, a friend of Baum’s. In 1904 Baum’s new publishers hired John R. Neill to illustrate The Marvelous Land of Oz, and he illustrated all subsequent Oz books until his death in 1943. The two books by Jack Snow were illustrated by Frank Kramer, The Hidden Valley of Oz by Dirk (his full name was Dirk Gringhuis), and Merry Go Round in Oz by Dick Martin. Numerous other artists have illustrated The Wizard of Oz over the years, most notably Evelyn Copelman, Dale Ulrey, Maraja, Michael Hague, Charles Santore, Lisbeth Zwerger, Greg Hildebrandt, Barry Moser, and Michael McCurdy. Many foreign editions have also had new illustrations.