Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A true intellectual reading

Few books will make your mind soar like this one can. Sagan's genius shows in this book again like it has in every other book he has written. What a wonderful book! It combines science, religion, philosophy, and literature. Each chapter begins with a wonderful quotation by some famous scholar or thinker.The most enjoyable part of the book is the debate between believers and atheists/agnostics. Definitely a very thought provoking book.