Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: NOT even worth a look

I had bought this book with an open mind. Once I started reading, I kept waiting for the how-to or just some interesting information. Sadly, I got nothing. The first half is about satanic/demonic theory. The second is basically a list of prayers to a pantheon of gods. It claims to be in Sanskrit, but I know Sanskrit, and this grammar is all wrong. One small part talks about how people(ninjas) used smoke bombs to cloud other eyes and cover themselves in their bombs to escape quickly. Even this trivial info is described vaguely. Sorry to say, the book is nothing more than a joke, believe me.