That's the problem - pregnancy is "textboot" compared to the actual babies once they arrive! So many different babies, so many different people with different ideas on parenting. You may think you know what sort of parent you are going to be, then find it all changes as well!
"What Mothers Do" is an excellent book though that fits in well with most parenting styles as it's more about you and adjusting to being a mother. It did wonders for my sanity as with a previous poster.
"Wonder Weeks" is good, as is "Happiest Baby on the Block" - these are particularly good if you have a fussier baby than normal.
You'll probably find yourself not following any particular book to the letter, but picking up ideas from several, unless you end up as somebody who likes a very strict routine (and have a baby that complies with this..!)
My first baby had horrendous colic and was very, uh, spirited. Hardly anything worked, but I read so many methods (mostly leaning towards the crunchy..) I learned a heck of a lot.
Second baby I was surprised to have a lot more success with the methods in those books, mostly because DC2 was, sleep issues aside, just not as hectic.
DC3 just slotted right in and any book would have worked on him! By this point I knew all the tricks to try from my studies first time round so that probably made him seem like a dream baby. Although the less said about him as a two year old the better, ha ha.
Best bet is to get some of the more general ones (like the ones I've mentioned above maybe) and then once baby is here, pick books that you find are more relevant to your situation e.g. a problem you may have like sleep or colic, or the parenting style you find yourself falling into.