Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Preaching to the choir

If you are THINKING about a wood stove, and wondering if it is an environmentally correct decision, if there are any real benefits to it, and have a bucket full of money available to you, this is the book to help make your decision. If you are a life long environmentalist who believes in getting off the grid but have a limited income and want practical advice about chosing a stove, used or economical, and installing it in your home, don't bother. I found this book useless.