User blog comment:Savannah Star/Regarding Fifty Shades and Twilight.../@comment-5505682-20120827030633/@comment-5605779-20120827030859

It's a trilogy of erotic novels. It originated as a Twilight fanfiction, and when E.L. James submitted it to be published, the publisher changed the characters' names because James isn't the author of the Twilight Saga and doesn't own any of Twilight's characters.