Instruct: Classify Amazon reviews into positive or negative sentiment
Query: very enjoyable little book

Small enough to fit in your pocket, but full of glossy full color pages of useful information, maps, and pictures, this guidebook is quite nice. Not as thick as the other PV guidebooks, but just as useful (or more so), and easier to carry around. Highly recommended. I liked it better than the other "big name" PV guidebooks.