What are your favorite political books?

As you may have heard, there's a political convention coming to town. To help set the literary mood, I'm planning a story highlighting some great political books you might like to dip into before the delegates arrive.

So far, in my chats with a few political junkies, Robert Penn Warren's "All the King's Men," the novel based on Huey Long, has received the most mentions.

Personally, Timothy Crouse's "Boys on the Bus" has been one of my favorites since I read it for a political science course at UNC Chapel Hill. At the time, I was an aspiring reporter who knew almost nothing about the actual practice of journalism. I lapped up Crouse's colorful insider look at the political reporters covering Nixon and McGovern during the 1972 presidential campaign.

So what are your favorites, and why are they so good? These can be fiction or nonfiction, highbrow or frothy.

Give me your suggestions. I'll include what I can in my story.