Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great leader, not so great leadership book

Ernest Shackleton accomplished arguably superhuman things. He was good at selecting, cajoling and inspiring men. How he brought his crew back alive from such a frozen, forbidding world, is one of the amazing miracles of the past two hundred years.Yet a close, hard look suggests that the leadership lessons to be learned are limited for most readers. The authors try too hard to take each Shackleton episode or act as a lesson tobe learned and applied yet these lessons are not as clear as the authors might want to suggest nor are the lessons necessarily generalizeable to modern life or commerce. After reading the entire book, little remains to explain Shackleton's theory or practice of leadership, just a lot of anecdotes and incidents. Shackleton and his leadership remain inscrutable.An amazing story, yes. An amazing leadership book, I think not.