Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very, very, very long

Excellent, like all his books. I really wish it had a better ending -- there were a lot of little strings that didn't quite get tied up, but at least he got the major strings, which is definitely an accomplishment.The most interesting thing about this book is that the central concept is coming true...or perhaps it's just *going* to come true. Whatever happens, it'll change the world.Worth reading.