Thought I'd add to this now I'm out the other side as what I thought I needed when I was pregnant wasn't necessarily that useful once little man was actually here!!
I second the Positive Birth Book and also Mindful Hypnobirthing. Although our labour didn't go to plan both books were still useful and I would take the same approach to labour again if we have another. I had an excellent pregnancy but unforeseen complications on the day so much of what happened was just bad luck really. I didn't have a 'pregnancy' book as such and I don't regret not having one.
I did get the Expectant Dad's Handbook for the very anxious OH!! He found it useful just to get a general idea of what to expect all in one place but I think he would say that nothing could really prepare him for it!! I'd agree with that too. I think a good general overview and an idea of what you'd ideally like accompanied by an open mind really is the best way!!
Although not a book, I really enjoyed Daisy Birthing classes. Although I wasn't able to use everything I was taught due to the complications, what I did manage was really useful and I would do them again with another baby.
As far as looking after a newborn - we didn't have a book and I can't stress enough how glad I am that we didn't have a book as I probably would have thrown it in the bin!! Google is your friend at 3am and you really do just learn as you go along!! You will find what works for you and your baby and no book can tell you that. If you really must buy something, I would stay away from anything that promises baby will sleep through or attempts to impose any sort of routine. It just gives false expectation when you're already overwhelmed. I definitely wouldn't put myself under nearly as much pressure second time round.
One thing both me and the OH wish we had known more about was the initial postnatal period. It really is tough so rather than prepare people, my experience is that people just don't talk about it at all. It still wouldn't have been easy but again some realistic expectation for both of us would have been helpful especially regarding the emotional side and my physical recovery. This was a glaring omission from our antenatal course and a massive bug bear of mine now. That antenatal course I definitely wouldn't have bothered with if I knew what I knew now!!
Hope some of that helps!!