Gentle Birth, Gentle Mothering – Dr. Buckley's book has a great discussion on truly informed consent, the difference between choosing an intervention, choosing an alternative, and choosing (consciously) to do nothing. It's really valuable for any mama-to-be, and especially if you're planning a VBAC!
(NOTE: Want Real Mom Tested Techniques for Handling Labor Pain? Use these 11 proven natural childbirth techniques to handle labor and keep things moving right along. Get them here.)