MARY SHELLEY's Frankenstein; or, The Modern Prometheus grew out of a parlor game and a nightmare vision. The story of the book's origin is a famous one, first told in the introduction Mary Shelley wrote for the 1831 edition of the novel. The two Shelleys, Byron, Mary's stepsister Claire Clairmont, and John William Polidori (Byron's physician) spent a "wet, ungenial summer in the Swiss Alps." Byron suggested that "each write a ghost story." If one...