Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Care For a Riddle?

I LOVED this book. It was gripping and interesting and I never saw the end coming. I think I went just about crazy trying to figure out the riddles and I even dragged my friends into it, but I never did end up figuring them out. In my defense...I suck at riddles. I would tell anyone who enjoys psychological thrillers to go pick this one up because it is a must read!