I happen to have both editions handy. Some sub-sections seem to be 30%-50% rewritten. A big change is there are lots of graphics. 2e seems to be improved, but i

I happen to have both editions handy. Some sub-sections seem to be 30%-50% rewritten. A big change is there are lots of graphics. 2e seems to be improved, but it's hard for me to estimate how much of an improvement it really is.