Bryan Caplan's excellent book, which demolishes the myth of the rational voter, is out. Go get it, now! Here is the introduction, here is the book's page, and here is Bryan's homepage at George Mason University. And yes, Bryan is a blogger too.
Once you are done with Bryan's book, you should also read Don Wittman's The Myth of Democratic Failure (which pushes the rational voter model to its logical extreme).
Here is an exchange between Don and Bryan over at Econ Journal Watch back in 2005.