In reply to Tommackie:
There is basically one definitive guide to Sardinia the 'Pietra Di Luna: A Guide To Sport Climbing In Sardinia' published by Fabula (and there's also a trad and multi-pitch one by the same author). The downside is that it's €48 to buy in Sardinia, and the best part of £50 in the UK... :|
We're just back from Sardinia - it is a fabulous place. I would have suggested also making the effort to go to Ulassai whilst you're there, but it will be too cold/poor weather higher up in the mountains at that time of year.
There's brilliant granite sea crags at Villasimius - a great alternative to the limestone around Cala Gonone.
We went out with a brilliant local guide for a few days called Ivan Tinda (found him via www.climbingsardinia.com) - his local knowledge really made the trip special - he's highly recommended!
Enjoy!
Post edited at 08:44