Mary Wollstonecraft Shelley (1797 - 1851) was an English novelist, short story writer, dramatist, essayist, biographer, and travel writer, best known for her Gothic novel Frankenstein: or, The Modern Prometheus (1818). She also edited and promoted the works of her husband, the Romantic poet and philosopher Percy Bysshe Shelley. Her father was the political philosopher William Godwin, and her mother was the philosopher and feminist Mary Wollstonecraft. After Wollstonecraft's death less than a month after her daughter Mary was born, Mary was raised by Godwin, who was able to provide his daughter with a rich, if informal, education, encouraging her to adhere to his own liberal political theories. When Mary was four, her father married a neighbour, with whom, as her stepmother, Mary came to have a troubled relationship. In 1814, Mary began a romance with one of her father's political followers, Percy Bysshe Shelley, who was already married. Together with Mary's stepsister Claire Clairmont, Mary and Shelley left for France and travelled through Europe. Upon their children died before Mary Shelley gave birth to her last and only surviving child, Percy Florence Shelley. In 1822, her husband drowned when his sailing boat sank during a storm near Viareggio. A year later, Mary Shelley returned to England and from then on devoted herself to the upbringing of her son and a career as a professional author. The last decade of her life was dogged by illness, probably caused by the brain tumour that was to kill her at the age of 53.return to England, Mary was pregnant with Percy's child. Over the next two years, she and Percy faced ostracism, constant debt, and the death of their prematurely born daughter. They married in late 1816, after the suicide of Percy Shelley's first wife, Harriet. In 1816, the couple famously spent a summer with Lord Byron, John William Polidori, and Claire Clairmont near Geneva, Switzerland, where Mary conceived the idea for her novel Frankenstein.