Caltech and The Feynman Lectures Website joined forces in fall 2013 to create an online edition of The Feynman Lectures on Physics in three volumes: Volume 1, Volume 2 and Volume 3.

First presented in the early 1960s at Caltech by the Nobel Prize-winning physicist Richard Feynman, the lectures were eventually turned into a book by Feynman, Robert B. Leighton, and Matthew Sands. The text went on to become arguably the most popular physics book ever written, selling more than 1.5 million copies in English, and getting translated into a dozen languages.

The new online edition “has been designed for ease of reading on devices of any size or shape,” and you can zoom into text, figures and equations without degradation.