The Secret Horrors of the Opera House. It is ironic that out of the dozen of books written by the French novelist Gaston Leroux, the one that has given him immortality is the classic of horror called ""The phantom of the opera"". It tells the story of a disfigured musical genius (Gerard Butler) who haunts the catacombs beneath the Paris opera house to take revenge against the world, until the day that he falls in love for a beautiful singer, who changes completely the course of his life. This small masterpiece have been taken to the theatre, to the musical comedy and numerous times to the movies, with treatments that are equally classic, since every director has given different interpretations to the character, from turning him into a symbol of the artist pushed back by the society up to the representation of the most incredible psychological aberrations. Whatever the version, this is one of the most entertaining novels of the kind and therefore its eternal popularity.