Instruct: Classify Amazon reviews into positive or negative sentiment
Query: very detailed descriptions, a great guide book

I used this guide while mountain biking in the White Mountains. It provides very detailed descriptions of a variety of off road trails and logging roads, as well as many road rides. The ratings help to determine whether you can handle the conditions of each ride, and the very complete directions minimize the loss of time searching for trail heads. A very well written guide that is small enough to be taken along in a shirt pocket.