Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Shackleton's Way

The book arrived just as promised and more quickly than I had anticipated. It is so gratifying to be able to do business with people who produce what is promised. While I haven't read the book yet, it comes recommended from a college professor who teaches leadership classes. The book is required reading for the class, and students who have read it give it high praise.Shackleton's Way: Leadership Lessons from the Great Antarctic Explorer