According to [1] it has been available for free online since 2013. I bought the hardcover 3+1&#x2F;2 volume box set at borders almost a decade ago.<p>[1] <a href="https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;The_Feynman_Lectures_on_Physics" rel="nofollow">https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;The_Feynman_Lectures_on_Phys...</a>