Climbing guidebooks are used by rock climbers to find the location of climbing routes at crags or on mountains. Many guidebooks also offer condensed information about local restaurants, bars and camping areas; often include sections on geology and local climbing history; and may contain many pictures to inspire climbers. Guidebooks may range in size from pamphlets detailing dozens of routes up to tomes that document thousands of routes. The library of the American Alpine Club contains over 20,000 books and videos, a majority of which are such guidebooks. In the Alps the Alpine Club Guide series is very comprehensive.