Instruct: Classify the given Amazon review as either positive or negative.
Query: This book rocks

An excellent book to prepare for the A+ exam. This book does what few others do--it helps you to understand what is actually going on inside the box. This is invaluable for the A+ test, where you WILL have to understand and analyze questions, not just repeat what you have memorized. I continue to use the book as a working reference, and find it gave me a fine background for my current studies--BS in computer science. (By the way, I passed with 93%.)