Instruct: Classify a review into positive or negative sentiment.
Query: This is a disappointing book; one would have hoped for more

The cover of the book is obviously designed to resemble "The Bible Code," and I suspect that people who like it are impressionable folk like the ones who bought "The Bible Code." Much more could have been done in a book about such an important and interesting topic. Perhaps in the U.K there is much interest in Mary, Queen of Scots. I would have liked to see deeper explanations of the theory of coding. The material on quantum cryptology was especially weak, I thought. Perhaps someone else will write something on this fascinating topic.