In 1797 an extraordinary visionary died, leaving behind a grieving husband, a two-year-old daughter, and a newborn. The woman was Mary Wollstonecraft, her daughter Fanny Imlay, and her baby Mary Godwin, who, through many trials and tribulations, grew up to become the remarkable Mary Shelley, creator of one of the most important books in literature: Frankenstein; Or, The Modern Prometheus. While many books have examined both women's lives,...