Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Worth Every Penny

Everyone should buy this book and read it. Everyone should read ALL the reviews posted here on Amazon. The reviews (both positive and negative) reinforce the message of the book, which is that psychology drives the market up and down according to a predictable pattern. The economists ALWAYS get it wrong, but Prechter got it right in 1982, and he predicted this big downturn although he was early. I also acted early and sold my stocks in 1999. Think outside the box!