(Full disclaimer: if you buy anything from Amazon through the links in this post, I get a kickback)
One of the books that helped us tremendously is Healthy Sleep Habits, Happy Child by Marc Weissbluth. The book gives a lot of info and practical steps on how to ensure your baby has a healthy sleep and boy does that make her happy. :-) We've been trying to follow the book's advice for a while now and the results are really good. Our daughter is going to bed around 7:30pm - 8pm and is sleeping through the whole night with the occasional break aroun 2am for a quick snack, but not too often. Not only is she less cranky, getting more sleep definitely helps mom and dad's mood as well.
If you have to buy only one baby book, buy this one. If you don't want to spend the money, check your local library or borrow it from a friend. But definitely find a copy and read it at least once.