Sadly it looks like there have been many additions since the 1st edition. The chapters that were new in the second edition are here. EDIT: Or at least, that page has some chapters suggestively titled newchap0x.pdf, I’m not sure if they have all the new material or only new material, since it looks like the chapters have been rearranged as well.
How different is this from the 3rd edition?
Sadly it looks like there have been many additions since the 1st edition. The chapters that were new in the second edition are here. EDIT: Or at least, that page has some chapters suggestively titled newchap0x.pdf, I’m not sure if they have all the new material or only new material, since it looks like the chapters have been rearranged as well.
I’ve heard that Stanford students use either the 2nd or 3rd edition. 1st one is quite a bit dated.