I just found out that Brian Tamanaha, the author of On the Rule of Law: History, Politics, Theory, blogs over at Balkinization. On the Rule of Law is a great introduction to the concept of the rule of law. The book is short (141 pages), but it does a great job explaining the different conceptions of the rule of law and how they developed. I recommend the book to anyone who anyone who is not quite clear on what the rule of law is or why people use it in different ways.
Here is Brian responding to the claim that the morality of atheists should be suspect.