Books on Birthing that i found good

Ina May Gaskin's Guide to Childbirth
Spiritual Midwifery by Ina May Gaskin (an old book)
Active Birth by Janet Balaskas
The Thinking Woman's Guide to a Better Birth by Henci Goer
Birth Skills by Juju Sundin

What to Expect when you are Expecting- I found good as a reference for the different weeks of pregnancy- BUT it was fairly medical and i didn't agree with everything in it.