Gregory Maguire (born 9 June 1954) is the author of Wicked: The Life and Times of the Wicked Witch of the West, along with the other books in The Wicked Years trilogy, Son of a Witch, A Lion Among Men and Out of Oz.
Maguire earned his B.A. from the State University of New York at Albany, and his Ph.D. in English and American Literature from Tufts University. He has been active in promotion of children's literature, with the National Children's Book and Literacy Alliance and other organizations.
Maguire has published a score of works in children's literature, from The Lightning Time (1978) to What-the-Dickens: The Story of a Rogue Tooth Fairy (2007). He has also written fantasy works for adults, which tend to take ironic, satiric, deconstructive approaches to the traditional fantasy literature. The title of his 1999 book Confessions of an Ugly Stepsister shows this orientation. Maguire's reversal of the traditional Oz literature, in which the villainess becomes the heroine, takes a comparable approach.