Promo Grimpe (2016) ISBN
Another of the poor Promo grimpe guidebooks with no colour or action photos and little to inspire you. Some of the more popular areas are in the other book Les Ecoles d'Escalade du Vercors where the crag is called 'Coulmes' and this should be adequate for most visitors.
Update: there is a new guidebook with colour photos, which gives the illusion that it might have been properly updated. Climbing areas are still not marked on the map and are awkward to locate. Approach descriptions are severely lacking and you can easily waste an hour or more trying to actually find the correct part of a wall. Worst guidebooks I've ever used.