Instruct: Classify Amazon reviews into positive or negative sentiment
Query: For Mature Truth-lovers

This book is mysterious--the author, James Keys, is a pen name for mathematician Gordon Brown, who cognized an algebra that describes the structure of the conditional universe. Brown's book, Laws of Form, is the most elegant and important work of math that touches directly on philosophy. If you have any serious inclination toward Truth, you ought to get both Only Two Can Play This Game (a fundamental metaphor on duality done in the form of a poetic personal essay) and the Laws of Form (a rigorous and deliciously elegant mathematical essay on the fundamental unity of All).Give Peace a Deadline: What Ordinary People Can Do to Cause World Peace in Five Years