Instruct: Classify Amazon reviews into positive or negative sentiment
Query: hiking book collector

I spend all winter planning my hikes for the summer. I own and have used most of the titles for Yosemite. Hiking Yosemite National Park has most of the most popular trails but two other books do a better job: 100 Hikes in Yosemite National Park and Lonely Planet Hiking in the Sierra Nevada.My main complaint is the incomplete descriptions, too short and too vague. If you get off the trail you'll run the risk of getting lost because there are no "big picture" maps. A topo is absolutely essential if you want to understand your location.