In reply to MrFlibble:
These are the obvious guides that you'll need and you'll probably get away with just having the first two from the following:
"Oisans nouveau, Oisans sauvage" (Livre Est)- Jean-Michel Cambon. Covers the Ailefroide area and is available locally. A very good guide despite some eccentricity.
"Grimper dans le Haut-Val Durance" - Yann/ Martine/ Rolland. A very good guide which covers all single and multi-pitch limestone climbing in the Durance valley and surrounding area as well as some of the Ailefroide granite areas. Available locally.
"Les plus belles escaldes calcaires des Hautes Alpes" - Bazet/ Giraud/ Rolland. This covers the big multi-pitch limestone routes on the Tete d'Aval and Serre Chevalier area. Again available locally.
"Ecrins Massif: Selected Climbs" - John Brailsford, published by the AC and (obviously) available here. It's still a very useful book to have for the big mountain routes although some care's needed due to the effect of climate change, compounded by dated descriptions and some errors (factual as well as of omission.)
Hope this helps and have a good trip. :¬)
Dave