Like SICP, the text of the book is online (http://www.feynmanlectures.caltech.edu/ http://www.feynmanlectures.caltech.edu/ if you didn't already know), so peopl

Like SICP, the text of the book is online (http://www.feynmanlectures.caltech.edu/ http://www.feynmanlectures.caltech.edu/ if you didn't already know), so people more likely link to that than to Amazon.