I'm an undergraduate Math student and I am doing a side project for which I would like to study Differential geometry and its applications in general relativity. I have taken a few proof based courses including Analysis I, Introductory Number theory, Abstract Algebra.
I would like to get a text that isn't too far above what I have studied but still challenging and informative. Any suggestions are welcome.
Thanks
Not claiming that yours is a duplicate, I am just pointing out that might be other related questions that you have missed.
http://math.stackexchange.com/questions/295773/riemannian-geometry-book-to-complement-general-relativity-course
– CvZ Sep 16 '15 at 21:11