Thanks for the reference to p. It looks like a good addition to the Thorpe I've done and the do Carmo and Lee that I am currently working through. I appreciate it. This is reasonable?
Lee's books are great as well, very different perspective, audience, motivation and development, but great. I am working through his first on topological manifolds now.
Also, at about the same level of difficulty but a different perspective:
http://books.google.com/books/about/Curvature_in_Mathematics...