Gregory Maguire (born June 9, 1954) is an American novelist. He is the author of Wicked: The Life and Times of the Wicked Witch of the West, Confessions of an Ugly Stepsister, and several dozen other novels for adults and children. Many of Maguire's adult novels are inspired by classic children's stories; Wicked transforms the Wicked Witch of the West from L. Frank Baum's The Wonderful Wizard of Oz and its 1939 film adaptation into the misunderstood green-skinned Elphaba Thropp. The blockbuster Broadway musical Wicked, at its height running nine companies simultaneously around the world, was inspired by Maguire's first grown-up novel. The musical is the ninth-longest-running play currently staged in London's West End (as of September 2015), and the sixth longest-running show in Broadway history.