Professor Weinberger has two interesting reviews of recent books:
The Cold War: A New History, John Lewis Gaddis (New York: The Penguin Press, 2005).
America at the Crossroads: Democracy, Power, and the Neoconservative Legacy, Francis Fukuyama (New Haven: Yale University Press, 2006).
I've just started Fukuyama myself, and recommend it to anyone wanting to understand the differences and divisions among conservatives, neo-conservatives, realists and all those other terms bandied about in foreign policy. I find the historical overview of many of these ideas particularly fascinating.