Sugar Qtr - off the top of my head I personally recommend 'Birth and Beyond' by Yehudi Gordon and Ina May's 'Guide to Childbirth'.

But it's a personal thing. Best to read or at least scan through as many as possible and decide what's best for you. A quick flip through them in the book shop will soon tell you which are in tune with your thinking and which aren't.

But then again, I'm not a woman, so perhaps you shouldn't listen to anything I say.