The latest volume in The New York Times bestselling physics series explains Einsteins masterpiece the general theory of relativityHe taught us classical mechanics quantum mechanics and special relativity. Now physicist Leonard Susskind assisted by a new collaborator Andr Cabannes returns to tackle Einsteins general theory of relativity. Starting from the equivalence principle and covering the necessary mathematics of Riemannian spaces and tensor calculus Susskind and Cabannes explain the link between gravity and geometry. They delve into black holes establish Einstein field equations and solve them to describe gravity waves. The authors provide vivid explanations that to borrow a phrase from Einstein himself are as simple as possible but no simpler.An approachable yet rigorous introduction to one of the most important topics in physics General Relativity is a mustread for anyone who wants a deeper knowledge of the universes real structure.