Hamburger, Philip.Separation of Church and State. Harvard University Press, 2002. Argues that the First Amendment to the U.S. Constitution has no bearing on the separation of church and state.
Marty, Martin E.Politics, Religion, and the Common Good. Jossey Bass, 2000. A professor of religion discusses the conflict between religion and politics and the proper place of religion in public life.
Wilson, John F., and Donald L. Drakeman, eds.The Church and State in American History. 3rd ed. Westview, 2002. Selections from documents, biographies, and other material organized chronologically.