Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great book for Sales Engineers

I work as a degreed Engineer selling turbomachinery technical products to the power generation, refining, and chemical business. I have always known dress is important in my business. This book is a great tool for me and I have recommended it to all of our sales team. In my business, the way you approach our client with dress can be an instant turnoff to them if you do not dress properly. The book is a very valuable tool for those in my field.