Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Wild idea is enchanting

O'Brien's story of getting caught on the horns of an idea that won't let him go--reintroducing buffalo to his ranch--is enchanting. So are his descriptions of some of the characters in his life, including the most important one, the high plains. You end up rooting for him and all those other folks enthralled by that hard land.