Instruct: Classify a review into positive or negative sentiment.
Query: Great book for anyone interested in storage

This is a great book with a great organization and topics, covering in layman terms, the evolving energy storage market. Great primer as I first joined the space. Since the space is evolving so rapidly, its already dated and in need of a new revision.The only downside is the ridiculous amount of spam that is generated when you buy from Amazon. They now think they know what I need and have permission to spam me three or four times a day, neither is accurate. Once a month might be okay. More, and I just delete without reading. I don't want to add them to my spam filter because as it will screw up future buying, but as its so annoying, I may never buy anything anyhow, so may add Amazon to spam filter soon.