In reply to john arran:
Guidebook from 2013, so pretty up-to-date. RocAndorra - escalada al Principat d'Andorra, by Patrick Périssé. Available in the Andorra outdoor shops like Viladomat, Carving, Intersport Outdoor. You won't find much online, other than the via ferratas, but I'm now adding the crags to the ukclimbing database.
It's worth coming over for some of the multipitch routes:
Pic de Ribuls N-O éperon directe - high mountain trad, 6a, 6 pitches plus scrambling to summit in Cirque du Pessons
La Margineda - 3 pitch bolted limestone south of Santa Coloma, 6a+
And then the Andorra la Vella granite - there are a number but the top three are:
Banzai, bolted, 6c+, 280metres, 10 pitches
La Capricciosa, bolted, 6a+, 245m, 11 pitches
La Crucis, bolted, 6a, 190metres, 9 pitches
And if you like severely overhanding granite in the 7s, El Carcamanyà delivers! And has shade in summer.
The rest of the crags are fun to visit if you are in the area, but I'm not sure you'd make a special trip just for them.