Books I can reccomend:
The Doula Advantage - Rachel Gurevich
Your complete guide to having an empowered and positive birth with the help of a professional childbirth assistant.
Ina May's Guide to Childbirth - Ina May Gaskin
Consider this your invitation to learn about the true capacities of the female body during labour and birth.
The Birth Partner - Penny Simkin, P.T.
Everything you need to know to help a woman through childbirth.