Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mediocre book

I saw this on a friends bookshelf and skimmed through it. In about 20 minutes, I found several things that were either misleading or totally false. Then, I tried Googling the author to see what his credentials were (I had never heard of the guy). Big surprise, can't find anything. You are way better off buying something by Paxton Quigley.