Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Book About What You Already Know.

I found most of this text to be kind of a waste. I'm an interemediate experience hiker but there's nothing new in this "bare bones" basic book. Even if I was just getting into the sport, I would NOT have learned anything that VERY basic common sense couldn't already tell me. ...I have found much more valuable information (and more accurate as well) on this same topic from more comprehensive sports medicine reference titles.