"دی فینٹم آف دی اوپیرا" is a novel written by Gaston Leroux, first published in 1910. The story is set in the Paris Opera House and revolves around a mysterious figure known as the Phantom, who lives beneath the opera house. He becomes infatuated with a young soprano named Christine Daaé and influences her career while hiding his disfigured face from the world. The novel explores themes of love, obsession, and the struggle between beauty and monstrosity. The Phantom is both a tragic and terrifying character, representing the darker aspects of human emotion. The story has inspired numerous adaptations, including films, musicals, and ballets.