I have The Nursing Mother's Companion by Kathleen Huggins, which was recommended by the lactation consultant who did the BF class that I took. The last time I was in the bookstore, I saw she just came ou with a new edition - the 5th one I think. I liked it because it had all the information in one spot - she divides it by ages - I think it goes the first 2 weeks, 2 weeks - 8 weeks, the first six months, and then past that - I'm not positive on that. Anyway, every section has an overview on what to expect and a "troubleshooting" guide. She also has a couple of appendices on calorie requirements, pumps, and a good one on drug reference - what's safe to take when your BFing.
That being said, you can probably find most of this information online but I found it easy to have it all in one place. I've also heard good things about LLL's The Womanly Art of Breastfeeding.