Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 163 reviews??? How can this be????

If you compare the number of reviews to other more popular trading books you see their number of reviews to be around 30 max the exception being Elders Trading for a living with 107. But 163 reviews, with reviews that exist at either extreme??? I believe the 5 star reviews are to bump up the average, proceed with extreme caution. Can you pick the 30 true reviews?