Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Complex & insightful

The title, alone, is interesting enough. I spent a few moments trying to properly pronounce the title. After reading the synopsis inside the covers, I was hooked. This book can be confusing & even more so the more you think about it. So, I just read and enjoyed myself. At times, I enjoyed the WWII segments more and other times I prefered the modern era more. Randy & Lawrence are protagonists are a bit more technically literate than average but are quite likeable and truly find yourself rooting for them. Their discussions with others can be deep and insightful but there is a humorous aspect that keeps everything enjoyable. Cryptography and history may not be the most interesting subjects but they are combined in such a way that you can't help but feel as if you've learned something. This book has stong sense of human nature (past & present), and technology, and where both are headed. I would recommend this book to all anyone who has an interest in either or both subject(s).