Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Buy Rainier Burgdorfer's guidebook....

Rainier Burgdorfer'sBackcountry Skiing in the Washington's Cascadesis MUCH MORE useful. I've got both this book and Burgdorfer's guide and this guidebook covers the same tours as Burgdorfer's book and doesn't provide enough new or different information about these backcountry ski tours to make it useful. As Mr. Blair mentions, Burgdorfer's book does cover some tours that are only accessible after roads have melted out or that require some mountaineering equipment, but that just makes it more interesting. The majority of Burgdorfer's tours are suitable for skiers of intermediate or better ability and do not require any non-skiing gear (i.e., mountaineering equipment).Martin Volken's guide toBackcountry Skiing Snoqualmie Pass (Backcountry Skiing)is also worth checking out as it does provide new and different options from Burgdorfer's guide in my opinion.