Frankenstein; or, The Modern Prometheus, is a novel written by English author Mary Shelley about eccentric scientist Victor Frankenstein, who creates a grotesque creature in an unorthodox scientific experiment. Shelley started writing the story when she was eighteen, and the novel was published when she was twenty. The first edition was published anonymously in London in 1818. Shelley's name appears on the second edition, published in France in 1823.