Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Thought Provoking

I've been one to dabble in quantum physics on and off in the theoretical field for a good part of my life. Toben and Wolf's book made it a lot of fun when I was first starting out. As I expand my knowledge of the relationships of this universe, I still come back to this work. If you happen to get your hands on a copy, guard it jealously! I'm in search of a copy for my adopted niece, and don't intend to lose mine!