The Phantom of Manhattan is a 1999 novel by Frederick Forsyth that serves as a sequel to the Andrew Lloyd Webber musical adaptation of Gaston Leroux's The Phantom of the Opera. In The Nineties, Lloyd Webber was developing a stage sequel to his biggest hit and he and Forsyth collaborated on a storyline for it. While plans for that show ultimately fell through, this novel is What Could Have Been for its plot, and many story elements would make their way into Lloyd Webber's official sequel Love Never Dies in 2010.