Instruct: Classify Amazon reviews into positive or negative sentiment
Query: One of the great writers!

Sixty years ago, Traven wrote books that taught you everything you needed to know about what Mexico and, indirectly, America were doing to Mexico's indigenous populations. Though often translated awkwardly from his original German into English, Traven's prose sings. As a leftist who fled a death sentence issued by the post-World War freikorps of Bavaria, he sympathized with the Indians of Mexico, learned their language, and told their story in such a compelling way that it will change the way you see the world. Traven is best known for writing "The Treasure of Sierra Madre," but his so-called jungle books, like "The Carreta," are perhaps his real masterpieces.