Instruct: Classify an Amazon review into positive or negative sentiment.
Query: The Troller Yacht Book: A Powerboater's Guide to Crossing Oceans

This book is primarily for folks who are thinking of buying, building, or having built a trawler and to take it on long cruises. This is not a book for those who already own a trawler and are trying to find ways to improve them and preparing them for cruising.