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Visit the publisher’s page (Basic Books) or the book’s website on The Theoretical Minimum series. Any new edition or corrected printing would be noted there.
The Theoretical Minimum of General Relativity: A Comprehensive Essay the theoretical minimum general relativity pdf upd
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Flatness vs. Curvature: Introducing the Riemann curvature tensor as the diagnostic tool for determining the "shape" of spacetime. Curvature : Introducing the Riemann curvature tensor as
Why is this a good thing? Most GR textbooks (Carroll, Wald, Misner-Thorne-Wheeler) are 500+ pages. Susskind’s PDF is ~200 pages. It gives you the minimum to read a modern paper on LIGO or black hole thermodynamics.
: You can view an official PDF sample of the book's introductory pages on the Penguin Books CDN Official Video Lectures