sentences:  The "Twilight" series made the number five spot on the American Library Association's (ALA) Top Ten List of the Most Frequently Challenged Books of 2009, for being "Sexually Explicit", "Unsuited to Age Group", and having a "Religious Viewpoint".A screenplay for "Twilight" was written by Melissa Rosenberg and has been adapted into a film by Summit Entertainment.The film was directed by Catherine Hardwicke, with Kristen Stewart and Robert Pattinson in the leading roles of Isabella Swan and Edward Cullen, respectively.