Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Astounding! The book scares me!

I read the book when it was first published in 1983, and I was absolutely blown away with Mr. Bamford's detailed knowledge of the NSA and related intelligence-gathering methods of that time. At the time the book was published, I had been working in this area for the Navy and I found this book filled with (among many other things) knowledge regarding satellite intelligence capability (at the time) which -- well, frankly, I was surprised to see some of it in this book. That's why I'm astounded at some of the content.I recommend it whole-heartedly to anyone who's interested in observing how the U.S. intelligence community (according to Mr. Bamford) conducted (and, I might suggest, still conducts) its affairs. I can't wait to read his new book!