Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Exciting, but short

I really liked this book. It was exciting and adventuresome. Best of all, it was free. Yet, it was very short. Normally my books are at least 300 pages, but according to the kindle, it was only (about, I haven't memorized the number) 130 pages. I thought since it's become a movie and everything it might be a bit longer.