Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Series

My son and I chanced upon the Animal Ark series at his elementary school's book fair. My son is 9 years old and reads above his grade level (4th), but it is hard to find chapter books that interest him. I was thrilled when he chose to read this book practically non-stop instead of spending so much time on the computer. An interesting story that includes appealing animals is perfect for readers his age. We bought 2 other books from this series at the book fair (he didn't stop reading until he finished them too), and I will be ordering many more for Christmas.