In reply to Handi-andis:
If you have a look at the tabs available for a crag ( top right drop down menu), you'll find a "guidebooks" field. If there is a guidebook to a crag it will be listed.
Here's one that might do:
North East Outcrops
Author Neil Morrison
Published SMC (2003)
ISBN 0907521746
Website www.smc.org.uk/