Instruct: Classify Amazon reviews into positive or negative sentiment
Query: THE handbook for product development leaders.

Don Reinertsen brings to life the cost-of-time impact on the product development process. It is this "hidden" cost that eludes most product developers and their management. We used his book extensively in the refinement of our Wolfpack product development process. If you're running a project or managing the entire process, keep this book on your desk!