I can't believe I've forgotten to recommend one of my all-time favorite books. Although it's non-fiction, it's somewhat historical: "The Boys on the Bus", by Timothy Crouse. It's about the political reporters who followed Nixon and the other presidential candidates in 1972. Just fascinating. For a rather (ok, lot) more trippy version, read Hunter S. Thompson's "Fear and Loathing on the Campaign Trail." If you like that, he's done many other books as well.