is a musical with music by Andrew Lloyd Webber, lyrics by Glenn Slater and later Charles Hart, and book by Lloyd Webber, Slater and Ben Elton. It is a sequel to the Lloyd Webber musical The Phantom of the Opera. The plot is not based on the story-line in the original book by Gaston Leroux, and Lloyd Webber stated, "I don't regard this as a sequel – it's a stand-alone piece".