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

I loved this book. It was even better than I thought it would be. I kept turning the pages, so eager to find out what happened next.It captured and caught my full attention. I wish a few more things had been explained though.Like who killed Billy and why?And how could Billy come back for good in his physical body{at least I assume thats what he did , judging from the very end}, when he had been dead for over 60 years?Those 2 parts still have me wondering , because they were never explained at all.The book was suspensful and gripping and had my heart pounding from the middle of the book on. Its one of the best fictional ghost stories I have ever read.