Pay Per Ghost
What they f*ck happened in the thread section here
I got his book, Hero with 1000 Faces for my dissertation at Uni last year. Some of it I didn't quite get but I think that's because I was skipping through it to find the most relevant pieces to use.
Interesting that you bring up Star Wars too, as I was largely studying the Samurai works of Akira Kurosawa for the dissertation and it was one of his films (The Hidden Fortress) that also inspired Lucas to make Star Wars.
Also, have you read any of Roland Barthes' material about myth? Some interesting stuff.
That sounds like something I would enjoy.