I think the authors would appreciate you learning more than you giving money for an out of print book, that probably doesn't net them (or their estates) a dime.

I think the authors would appreciate you learning more than you giving money for an out of print book, that probably doesn't net them (or their estates) a dime. It really is a good read, and the first book that really helped me to begin to understand the Schwarzschild geometry, just what the hell a "4-vector" was, and in general how many mathematical concepts relate to heuristic ones.