E L James's erotic Fifty Shades of Grey trilogy took the world by storm, selling millions of copies and becoming an international cultural phenomenon. Originally written as Twilight fanfiction, the trilogy traces the intense relationship between college student Anastasia Steele and young billionaire businessman Christian Grey. The original trilogy is told from Ana's point of view and consists of the books Fifty Shades of Grey, Fifty Shades Darker, and Fifty Shades Freed. A fourth novel, Grey: Fifty Shades of Grey as Told by Christian, retells the events of Fifty Shades of Grey from Christian's perspective. The first three novels have been adapted into movies.