Over the last few years, “Wicked” has overtaken the media, both in its Broadway and cinema forms. While the songs are catchy and the cast members are star-studded, much of the material for these productions comes from a 1995 novel of the same title by Gregory Maguire. Despite the popularity of the musical and films, readers may be surprised to find that the novel is a far cry from the Oz of Cynthia Erivo and Ariana Grande. “Wicked” is classified as a dark fantasy book. It la