The Theoretical Minimum
Core Course 1: Classical Mechanics
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The book, also published in 2014 by Penguin Books under the title Classical Mechanics: The Theoretical Minimum (ISBN 978-0141976228), is complemented by video recordings of the complete lectures which are available online. There is also a supplemental website for the book.
Core Course 2: Quantum Mechanics
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The second book in the series, by Leonard Susskind and Art Friedman, was published in 2014 by Basic Books under the title Quantum Mechanics: The Theoretical Minimum (ISBN 978-0465062904). Video recordings of the complete lectures are available online.
Core Course 3: Special Relativity and Classical Field Theory
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The third book in the series, by Leonard Susskind and Art Friedman, was published in 2017. This covers special relativity and classical field theory.
Core Course 4: General Relativity
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The fourth book in the series, by Leonard Susskind and André Cabannes, was published in January 2023.[4] This covers the general theory of relativity.
Above sections taken from The Theoretical Minimum - Wikipedia
Which book is The Theoretical Minimum: What You Need to Know to Start Doing Physics? It seems like No. 1 in the series, but I see that as the classical mechanics one.