Gregory had written a dozen novels for children before launching his first adult novel, Wicked: The Life and Times of the Wicked Witch of the West. A devotee of children’s fantasy, Gregory’s subsequent novels for adults are variations on-a-theme: Confessions of an Ugly Stepsister considers Cinderella as a seventeenth-century maid from Haarlem; Lost evokes the ghost of Charles Dickens’ Scrooge and Mirror Mirror concerns a High Renaissance Snow White trapped in a household governed by the scheming Borgias. Gregory’s latest novel, After Alice, honours the 150th anniversary of the publication of Alice in Wonderland. Gregory’s novel Wicked is now followed by subsequent volumes in The Wicked Years sequence: New York Times bestsellers Son of a Witch, A Lion Among Men and the final volume, Out of Oz.