Robert Geroch\'s Lecture Notes on General relativity are unique in three main respects.
Second, the physical phenomena are first properly explained in terms of spacetime and then it is shown how they can be "decomposed" into familiar quantities, expressed in terms of spa.
First, the physics of General relativity and the mathematics, which describes it, are masterfully intertwined in such a way that both reinforce each other to facilitate the understanding of the most abstract and subtle issues.
Robert Geroch\'s Lecture Notes on General relativity are unique in three main respects