Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The best

When I was just becoming a mathematician, my teacher gave me this book, saying "You're not ready for this yet, but you should have it --- it's the best piece of mathematical exposition there is." Maybe that claim's exaggerated, but I've yet to find one I prefer. Along with Milnor's Lectures on the h-Cobordism Theorem, and his Characteristic Classes, this book is a lesson not only in topology (and wonderful topology, too!), but in clear writing as well.