The Party's Over is a very good peak oil book -- the amount of research and facts that went into it are very solid. I would reccommend it over Kunstler's The Long Emergency. The Long Emergency is a good read, but it can sometimes get a bit too speculative. The Party's Over is chock full of information about energy. (It had a few surprises for me. For example, when I was in school, I was taught that nuclear energy could be the the source of limitless energy if we could handle its dangers -- but The Party's Over talks about how it's not limitless. Once we exhaust our uranium reservers, nuclear power will not at all seem limitless....)