I would recommend Henci Goer's Obstetric Myths versus Research Realities.
For those of you who have exclusively practiced in a hospital setting and haven't seen a lot of non-intervention births, it might shock you to know how many of the interventions in OB are not supported by obstetric research.
I also think Penny Simkin's The Birth Partner is excellent, especially for those who feel like they have a handle on the technical side of birth but lack real skills in terms of labor support.
And, since I'm being so sassy anyway

may I make a suggestion that is not in the form of a book? Consider, as an L&D RN, taking a doula training course, where you learn nothing but labor support techniques for the mother and family.
Having served as a doula at births, I have sometimes been shocked at how little some of the nurses knew about simple labor support. Their only suggestion was to call anesthesia and order an epidural. Now, I know that some of the problem was not a lack of knowledge, but a lack of time because of a heavy workload. However, some of the problem was a real lack of knowledge, particularly from younger nurses. (Long time nurses seem to have a better backround in non-pharmacological labor support.) I think a doula training can be a wonderful refresher! And non-nurse doulas would LOVE to meet an L&D nurse in order to gain valuable knowledge from a nursing perspective. We appreciate hearing what RN's go through as well, and I have some more than one L&D nurse protect her patient in amazing ways.
And though this is off topic, I'll say this much: at my last birth, the nurses were so incredibly cool to me. It was great!
Alison
Nursing News