Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worth its weight in gold

Several years ago I was asked to teach a class on doctrine at my church. I had read Dr. Cottrell's excellent commentary on Romans, and I went searching to see what books he may have written on theology in general. I was delighted to find that he had just published The Faith Once for All. I bought a copy and was not disappointed. It was an excellent resource in preparing my lessons, and I have found it a valuable reference work ever since. Last year my men's small group studied through it cover to cover. It prompted great discussions every week, and all of the guys in the group gave it rave reviews.