 Shelley became a key member of a close circle of visionary poets and writers that included Lord Byron, John Keats, Leigh Hunt, Thomas Love Peacock and his own second wife, Mary Shelley (the author of "Frankenstein").Shelley is best known for classic poems such as "Ozymandias", "Ode to the West Wind", "To a Skylark", "Music, When Soft Voices Die", "The Cloud" and "The Masque of Anarchy".His other major works include a groundbreaking verse drama, "The Cenci" (1819), and long, visionary, philosophical poems such as "Queen Mab" (later reworked as "The Daemon of the World"), "Alastor", "The Revolt of Islam", "Adonais", "Prometheus Unbound" (1820)—widely considered his masterpiece, "Hellas