Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Back Pocket Dyno

This is an excellent resource. Nowhere else have I been able to find just the information I want; printed in logical order. I'm building a web site about my truck, and the BPD is my bible for determining just the right gear combinations to maximize my performance with the Gear Vendors gearsplitter I've installed. I don't have a lot of money for R&D, and this book has given me just the right info I need. Thank you!