Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not impressed...

Not worth the money. Too many diagrams which could have been dispensed with through good old-fashioned writing. Really bad, or no, editing. Too many over-used exclamation points!!! Yeah, like that. But--what really annoys me--is that I will NEVER get back the time I spent reading this book. Definitely the first... and last Matthew Reilly book I will read.