Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Brilliant -- Nothing Like it in the Ninja World of Books

I was surprised! I thought I'd seen all there was to see about Ninja in print. But this book, published in Tokyo, has got to be the best! Page after page of color photos of nasty Ninjas doing their stuff, and between loads of fascinating info that I, as a Ninja buff, never even knew. Like what do Ninja eat? How do they tell the time from a cat's eye? What's the real colors of their costumes? (The answers: Tofu; by the dilation of the pupil; blue, but also other colors, such as grey, brown, etc depending on light). If there was one complaint, that is that I want more! If you're into history, martial arts, Japan, or just get off on super cool Ninja coolness, get this book!