Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Not For Programmers

This was recommended to me as the authoritative and best introduction to cryptography for anyone interested in Encryption. I'm a programmer, and that particular recommendation didn't take my profession into account. Apparently.This is a history book. Sure, I expected to read some historical context. I expected to learn that the first encryption techniques were simple dictionary ciphers. I expected to learn about Da Vinci's reverse writing. I expected to learn about rotating keys and the Enigma machine.But that's not what I found in this book. This book exemplifies why I hated history in school. This is a book for the type of pseudo-intellectual who prefers to learn about people who know something special, rather than learning something special, themselves. Seriously, how can anyone read a book this big about a subject (cryptography) that provides them with absolutely no usable knowledge on that topic. Nothing. Nada. Zip.