Instruct: Classify Amazon reviews into positive or negative sentiment
Query: a must

Ok, Ninja stories are passe now, and so 80's. I'm sure Ninja is to the 80's what the vampire is to the 90's. But you should really read this book. The story is rich, the dialogue is fantastic and the action is beyond compare. The Ninja is entertaining all the way through, and it's well worth the price of admission.