Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Possibly the best reference on mountaineering ever!!

This is by far the best reference book on all aspects of mountaineering, covering all the possible information a mountain reference book can, from wilderness basics, navigation or rock climbing and to snow geology, survival, rescue and leadership.It's not the best because it has all these topics covered, but also it has evolved through six remarkable editions, covering a wider range in each one!!If you have something to do with mountaineering, do not hesitate even for a moment to pick this piece, you won't be disappointed!!