Mary Shelley was born on August 30, 1797, in London, England. She married poet Percy Bysshe Shelley in 1816. Two years later, she published her most famous novel, Frankenstein. She wrote several other books, including Valperga (1823), The Last Man (1826), the autobiographical Lodore (1835) and the posthumously published Mathilde. Shelley died of brain cancer on February 1, 1851, in London, England.