Given the task definition and input, reply with output. Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

The book Castle in the Attic is a good book.My favorite part is when william defeated Alastor. There was one other good part in Castle in the Attic. When William was trying to get to Alastors kingdom and the dragon was distracting him with bad visions. I recommend this book to anybody who likes exciting books.
Positive