In reply to OP
Guidebook 'Le Rocher de la Chaux' available in the bookshop in Saint Jean d'Aulps (300m on the left after the tourist info office heading north towards Lac Leman). Price 8 euros. Saint Jean d'Aulps is 10 mins north of Les Gets. Take the last turn right as you leave the town, two mins up here, road takes a right bend, park on the left just before the bend, (gravel park area). Path up left to crag - 5 mins approx. plenty of sport routes (low, med, high) and two VF one introductory and one more advanced, with variation (named something to do with an elephant I think...) all very accessible and a good introduction to the area. Hope you have a good trip. Jim