The Feynman Lectures on Physics, the most popular physics book ever written, are completely online. Read it here: Volume 1: feynmanlectures.caltech.edu/I_toc.html Volume 2: feynmanlectures.caltech.edu/II_toc.html Volume 3: feynmanlectures.caltech.edu/III_toc.html

I often say Richard Feynman is the best teacher I never had. If you haven’t already, check out his work. Beyond his immense talent as an educator, he’s also quite the character.