She wrote Frankenstein: Modern Prometheus nearly 200 years ago. And she was a girl. Like 20 years old!
Ken Russell's brilliant Gothic is a post modern tale of how she came to write it, and stars the wonderful Natasha Richardson (who was 22 when she made the movie) as Shelley. I highly recommend the movie, although it is trippy. But then it's Ken Russell, so enjoy!
A friend told me he was writing a paper on Frankenstein, with the monster, Dr. Frankenstein, and the sea captain (the book's narrator) representing the id, the ego and the super-ego, which sounded like a cool paper for college. But then I haven't read the book OR taken psych 101... but still, sounded cool.