I tried to read up the duff but couldn't get into it. I got my copy of what to expect when your expecting (I picked up my copy from a second hand book shop).

Another couple of books was the "how to have a great birth in Australia' which provided stories from a dozen or so women about their birthing experiences. There is also a male version of the book - written by men about their experiences of their partners giving birth (I found these books to be really good in knowing what different births can be like.)

You can get loads of information from the web.