In reply to Ramblin dave:
I'm from the area. There are very nice climbs up the Ossau (note there is no walk up), that might become a little bit technical but the normal route only includes three grade 2/3 chimneys that shouldn't be a challenge for anyone having climbed a little. Can be a bit busy though. Funny rock (andesite) unlike anywhere in the Pyrenees. The Petit Pic offers more difficult routes but there is usually a lot less people.
In any case, spend some time walking around the Ossau, the views are quite stunning.
The Balaitous might be a little bit more accessible, but it's also a "technical" mountain. Once again not a challenge if you climb but intimidating for hikers. Offers good views on the Vignemale massif but a nice place in itself.
Good huts all around both massifs.
Laruns is a good base if you really want to stay only around there. It's a big village with everything you need. If you want more activity, Oloron is a nice little town with a lot of cultural activity in summer (and a good climbing wall if needed). If you want to move out more (to Lescun, Gavarnie or Vignemale for example), this might also help to get out of the valleys.
The reference book for the Ossau is "La Vallee d'Ossau" by Alfonso & Buxo, in French or Spanish
For the Balaitous (and Pyrenees in general), "les plus belles courses" by Laurens but it only gives a couple of routes for each mountain. The book is a classic though
If you find one, "passages pyreneens " is the bible of the Pyreneist, but it is not published anymore: rare and expensive then.
The other resource is usually the "guides ollivier", with a flourish of routes, but little detail about them.
Camptocamp is probably all you need, but it's not as nice.
Post edited at 14:14