Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good introductory-level textbook.

I just finished taking a class called "Introduction to American Politics" and this was our only textbook. I found the textbook to be easy to read, clearly written, and factually accurate. I fear that many students, like myself, who have already studied some in this area may find the book to be too simplified, and will get bored reading about the basics of material which is already familiar to them. The book is great for the novice, but is definitely not upperclassmen material.