My all time favorite PG book (for me) was "Christ Centered Childbirth." Even if you're not a Christian, it has the best, most complete info about pregnancy, labor and childbirth. My Doula said I was the most informed client she'd ever had!
There are several good books avaliable on Amazon for your little one, I had 2 for my DS, a Richard Scarry book called "The best Christmas Ever" and another one I p/u at the 99c store of all places, but they aren't worth bragging about, he just enjoyed hearing stories about families expecting a baby. My DS LOVES anatomy so he loved my Nat'l Geographic "In the womb" video, but he was a little older (he was just over 3 when she was born) and has an almost odd facination w/ the body (I think he'll be an OB or Pedi.).