Dr. Sears has a couple, Baby on the Way and What Baby Needs, that deal with pregnancy and a new baby. I got them from the library for my (then) two year old when I was pregnant with my son. I may just buy them this time. I remember them being pretty helpful. They mention home birth and birth center births as well as breastfeeding, co-sleeping and babywearing. There are others out there too (by other authors). I know there is one that is specifically about homebirths, but I can't remember the title at all.
I had a hard time finding books when I was expecting my second, since most of the ones out there seem to involve hospital births, and cribs, and bottles — all things that weren't the way WE do it. Then I found "Welcome with Love", by Jenni Overend at my midwives' office. It is great! A BEAUTIFUL story, just wonderful. I'd definitely recommend it to anyone planning to homebirth their second (third/fourth/etc.) baby.
I've found it's also published under the name "Hello Baby". Here's a link to a cheap copy on Amazon.ca.