' The whole thing was basically an experiment ' Richard Feynman looking back on the origins of these lectures said late in his career. It turned out to be a hugely successful one spawning books that have remained a definitive introduction to all physics for decades. & now ' Basic Books' is proud to publish the complete error-free & authorised collection of the late Richard P. Feynman's lectures. As a fundamental aspect of our knowledge of the physical world quantum mechanics remains a vital subject in physics. Feynman begins with the ideas of amplitudes & the abstract notion of a state in Volume I before moving on to the study of two-state systems in Volume II. The novel approach in Volume III rounds out & builds upon the material developed in the earlier lectures while remaining independent of the first two. Timeless & collectible the lectures are essential reading & listening not just for students of physics but for anyone seeking an introduction to the field from the inimitable Richard Feynman.