In reply to OwenM:
I've done most sections of the Cuillin Ridge, albeit not all in one go, and having used Skye Scrambles, Rockfax and the recent 'Skye The Cuillin' Climbers' Guide on various occasions, I rate Mike Lates' Climbing Guide most highly of the three. Just about the right amount of detail. You definitely want to use a Harveys Map as well.
Gordon Stainforth's The Cuillin looks to have a pretty good description too, but I've never tried using it, and the book is now pretty difficult to get hold of.