Frankenstein; or, The Modern Prometheus, is a novel written by English author Mary Shelley about the young student of science Victor Frankenstein, who creates a grotesque but sapient 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 novel Frankenstein is written in epistolary form, documenting a correspondence between Captain Robert Walton and his sister, Margaret Walton Saville. Walton is a failed writer who sets out to explore the North Pole and expand his scientific knowledge in hopes of achieving fame. During the voyage the crew spots a dog sled mastered by a gigantic figure. A few hours later, the crew rescues a nearly frozen and emaciated man named Victor Frankenstein. Frankenstein has been in pursuit of the gigantic man observed by Walton's crew. Frankenstein starts to recover from his exertion; he sees in Walton the same over-ambitiousness and recounts a story of his life's miseries to Walton as a warning. Frankenstein is infused with elements of the Gothic novel and the Romantic movement and is also considered to be one of the earliest examples of science fiction. Brian Aldiss has argued that it should be considered the first true science fiction story, because unlike in previous stories with fantastical elements resembling those of later science fiction, the central character "makes a deliberate decision" and "turns to modern experiments in the laboratory" to achieve fantastic results. It has had a considerable influence across literature and popular culture and spawned a complete genre of horror stories, films, and plays.