Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great book with a mediocre ending

Great thriller throughout with some unbelievable turns. With all the imagination used to create the body of the book you would think the ending would have had more development and forethought. I could not put this book down and would not have guessed that after I turned the final page I would be so dissppointed. I want to be suprised at the end, not fed the predictable