Great thread! I recommend "Ina May's Guide" to every single mother thinking she wants to get pregnant, is pregnant, or has someone in their family that is pregnant. It's such a great reminder that - our bodies are made to do this naturally, 10000's of women give birth without interventions when given the correct support, nutrition, etc. I love this book.
I did read Spiritual Midwifery. A little bit too "peace, love, wave our hands in the air, floating on magic clouds while contractions are happening" for me. I agree that birth can be a bit of an out of body experience and trippy for some women, but there's a few stories in there where the women are looking down on themselves laboring. (Supposedly no one was smoking anything, but it seems a little odd)
I've read the Birth Partner, and I think it's a pretty good read.
The other book I really recommend is Gentle Birth, Gentle Mothering. Sarah J. Buckley is an Australian doctor that has homebirths and is very supportive of women who are medically minded to choose this path. It's awesome, amazing, and spoke to me on a variety of levels. What I love most about it is that it goes through so many of the choices mothers have to face... and gives pros and cons of each. For example, before reading this book, I didn't think that there was anything negative to ultrasounds at all. What's the big deal? Everyone gets them, right?! In her book, she explains how great midwives can typically 'feel' more than the ultrasound can 'see' - and if it's such things are heart defects, etc., they can hear this too. Plus, the noise level that ultrasounds introduce to the fetus can be deafening (and some children with higher ultrasound rates have significant hearing loss through their first 1-2 years). If you're getting just one ultrasound, it's understandable... but if there's no emergency pointing to need an ultrasound - then it's really unnecessary! That's just one of the many topics in there, and she also goes through her birth stories... Love this book. I'm going to look for more things from her to read this pregnancy.