Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Helped me, maybe you too

I found the AP US History Review book very helpful. The review was especially helpful - it was clear and concise. And the practice exams - "forget-about-it." The trick is that you have to already know what you are studying before you use the book because afterall, the book is just a review. It should only remind you of what you already know. The book is just brief enough to not cloud your mind and confuse you and is just comprehensive enough to get you everything you need to know. All said and done, I would definately recommend this book to anyone who wants to pass the exam, but beware, you must study too.