Yes that's the one.
I guess it's not so new of a text anymore so that would explain why it's so inexpensive. It's still, in my opinion, the defining text as far as "field notes" for observations in the wild. The link you referenced is essentially an online version of that book, unfortunately somewhat condensed (e.g. fewer pictures). The link is good, but the paper book is better.
Very worthwhile having in one's library.