 Einstein's Clocks, Poincare's Maps: Empires of Time by Peter Louis Galison, August, 2003
 General Relativity by Robert M. Wald, July, 1984
 Relativity: The Special and the General Theory by Albert Einstein, June, 1995
 Exact Solutions of Einstein's Field Equations by Hans Stephani, Dietrich Kramer, et all 15 July, 2002
 Gravity: An Introduction to Einstein's General Relativity by James B. Hartle, 26 December, 2002
 Flatland: A Romance of Many Dimensions (Dover Thrift Editions) by Edwin A. Abbott, Banesh Hoffmann, October, 1992
 Exploring Black Holes: Introduction to General Relativity by Edwin F. Taylor, John Archibald Wheeler, 12 July, 2000
 A First Course in General Relativity by Bernard F. Schutz, February, 1985
 Gravitation and Cosmology : Principles and Applications of the General Theory of Relativity by Steven Weinberg, July, 1972
 The Future of Spacetime by Stephen W. Hawking, Kip S. Thorne, et all June, 2003
