Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Full of information.

This book is full of useful tricks to help one retain memory and become a better thinker. However, unlike many other books of its type, it is highly entertaining and full of amusement. There are tidbits of information that trivia buffs will find useful, but for the most part the book is a refresher course for everthing they taught you (or at least tried to teach you) in school. If you're even vaguely interested in improving your mind and want to learn all the stuff you found so boring in school, this book is a wonderful aid.