Here's my favorite essay from String Theory that really sums everything that book is about: http://www.esquire.com/sports/a5151/the-string-theory-david-... This version is a bit of pain though since the footnotes are collected at the end and you would have to swap back and forth to read them; the book allows space on each page to make it much more convenient. I think I'm in the minority, but I really wish Infinite Jest handled footnotes in the same way.
