Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lehane Presents a Stunning Psychological Thriller

Shutter Island grips you from the start, and keeps you reading long after bedtime! As you turn the pages, you begin to wonder what the heck is going on on this island, and the more you read, the better it gets. However, be prepared for an ending that will rock your world! I have not read a book of this quality in a while, Lehane has really created a Psychological Thriller that keeps you guessing until the last page.