Charles W. Misner, Kip S. Thorne, John Archibald Wheeler.
Gravitation.
1970
(read but not reviewed)
Coordinate free General Relativity.
Space tells matter how to move.
Matter tells space how to curve.
Time is defined so that motion looks simple.
[I found the metaphor of 'bongs of a bell', used to explain 1-forms, less than illuminating.]
