Thoroughly useful guide, fully indexed, and with photographic topos, and extensive historic section.
Martin Crocker is himself responsible for a lot of the routes, and probably knows the crags better than most. Usefully, the guide is in a two-in-one format where the Avon and Cheddar guides are separate books in a climber-friendly format.
The Climbers' Club was founded in 1898 and is a national club, which aims to encourage climbing and to promote the interests of mountaineers and the mountain environment. The CC produces guidebooks to climbing areas in the South of England and Wales.