Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Enjoyable and informative!

This book is a good primer for anyone interested in an introduction to the history, personalities and methods in cryptography. I'm not very adept at math but that didn't hamper me in reading this book. Simon Singh, as he did with his book on Fermat, takes us 'innumerates' into mind when writing his books and gives clear and concise explanations that don't get lost in jargon or presume his readers are math heads.A fun and informative book on an important and facinating subject!