Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Shattered Air

Excellent account of the events of July 27, 1985. As an avid climber of Half Dome, I have heard the lore of this event for twenty years. Finally, a thoughtfully researched piece on the events and people who converged to experience this tragedy. A good, quick read which is enhanced with solid, technically detailed data on climbing and Yosemite specifically. Very accurate, even down to the detail of the spring off the trail up to Quarter Dome.