"She is singularly bold, somewhat imperious, and active of mind. Her desire of knowledge is great, and her perseverance in everything else she undertakes, almost invincible." Mary Shelley began Frankenstein in 1814, when she was eighteen. By then, she had been living for two years in a scandalous relationship with the poet Percy Bysshe Shelley, who was already married with children. The novel was conceived in a contest with him and Lord Byron to tell ghost stories. When she...