Frankenstein or The Modern Prometheus , was completed by Mary Shelley at the age of 19. She infused this original novel with Gothic and Romantic elements. Scientist Victor Frankenstein creates a large and powerful creature in the likeness of man, but is disgusted by his own creation and he abandons the being to fend for itself. Spawning generations of horror stories in the genre, Frankenstein is a gruesome warning against playing God and attempting the engineering of life.