Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Really Good!

This book was a really good book and most of it was action-packed and exciting! I have to tell you, though, that some parts were not as good as they could have been. Most of the time I was on the edge of my seat, and at other times I was ready to fall asleep! Overall I liked it a lot. If you liked this book, I'm pretty sure you will like the next book, "Vision of the future", alot! It was exciting the whole way through, from cover to cover!