Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This library can change behavior

As an HR manager, I've been attending Bob Nelson seminars and buying his books for years. These books are full of highly practical, actionable advice that, if followed, can literally change the behavior of talented but sullen employees who often simply don't get the validation they need from their managers. Research shows that employees don't leave their jobs, they leave their managers--and in this climate we can't afford for that to happen. I will also recommend Beverly Kaye's excellent book "Love 'Em or Lose 'Em" as another great tool for retaining your best and nurturing your brightest.