The award-winning Wicked, London’s 14th longest running show, is based on Gregory Maguire’s 1995 novel ‘Wicked: The Life and Times of the Wicked Witch of the West’, which is set in the land of Oz way before Dorothy and the gang got there in The Wonderful Wizard of Oz. The show tells the story of an unlikely friendship between two sorcery students at Shiz University, who eventually become Glinda the Good Witch and the Wicked Witch of the West.