For more than thirty years, Richard P. Feynman’s three-volume Lectures on Physics has been known worldwide as the classic resource for students and professionals alike. Ranging from the most basic principles of Newtonian physics through such formidable theories as Einstein’s general relativity, superconductivity, and quantum mechanics, Feynman’s lectures stand as a monument of clear exposition and deep insight. Responding to the tremendous clamor for the original audio tapes from which the Lectures on Physics were transcribed, Persues Books is releasing Feynman’s original recordings, remastered for modern audio equipment and re-organized for cohesiveness and convenience. Timeless, and collectible, these tapes will serve as a comprehensive library of essential physics by a legend in science.