More than forty years have passed since Richard Feynman taught the introductory physics courses that led to the creation of these three volumes, titled "The Feynman Lectures on Physics."

In these forty years, our understanding of the physical world has changed significantly, yet the "Feynman Lectures" continue to stand the test of time. Today, these lectures are as powerful as they were when first published; this is due to Feynman's unique physical insight as well as his teaching and pedagogical experience.

The Lectures have become a subject of study worldwide by physicists, both those just starting their careers and those already established in their field. They have been translated into at least 15 languages and over 1.5 million copies have been printed in English alone. Likely no other set of books has had such an impact for such a long time.

This current definitive edition of the Feynman Lectures on Physics differs from all previous editions in two ways: it corrects all known errors to date and additionally includes a new, fourth volume, titled: "The Feynman Lectures in Physics: A Supplement on Problem Solving for the Lectures on Physics."

This supplement contains additional material from Feynman's courses: three lectures on problem solving and one on inertial navigation, along with solved exercises and their answers, compiled by Feynman's colleagues, Robert B. Leighton and Rochus Vogt. Kip S. Thorne.