Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Amazing journey. Incredible leadership portrayal.

I hardly put this book down. I had read small parts of Shakleton's voyage before, but I wasn't ready for the overwhelming content of the expedition and its sense of drama. As a previous reader suggested, those who didn't give at least give 4 stars here, aren't cut out for this type of adventure, and obviously don't dream of expanding their personal limits. Stay in your armchair.