Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Couldn't Wait

I read this book in two days. Whenever I put it down, it was always on my mind. I've never had a series of books do this to me. I can't wait to read the fourth. I held off on the third book because I knew once I got started it would be very difficult to put it down! I am now and always will be a HUGE fan of Harry Potter books.