Instruct: Classify an Amazon review as either positive or negative.
Query: Enthralling topic, good book

I thought the information, the stories, and the investigation of the code was amazing. The book however got very repetative. At first I couldn't put the book down, but I found myself stuggling to finish the last couple of chapters because they talked about the same thing over and over again. Also I think it would have been better if the author would have explained the actual code mathmatically so we could have a better understanding of the enormus complexity of this phenomenon. Othe than that I thought it was a great book.