Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A+

I'm going to make the review simple. This is an excellent book. Unlike other scientists who attempt to write for the public, Kaku has the ability to communicate his ideas and his knowledge effectively. People with little understanding of the field of astrophysics will be able to educate themselves with this book.The information is well organized. The writing is clear. This is a worthwile read for anyone at any level.