In reply to AlanRowe:
The SMC Scottish Rock Climbs "general guide" has all the major lines covered.
Scottish Rock South (Gary Latter) also covers it and has really good photo topos.
The older SMC guide for Arran, Arrochar, and Southern Highlands has more obscure lines but being an older guide only has vague sketch topos.
Not looked at the newer SMC Inner Hebrides guide but I expect it should have photo topos and more detail than the general guidebook. However, if you don't want to spend £25 for just that part of Scotland (an amazing part though it is), the general guide does cover all the classics.