Michael Cromartie, ed., Caesar's Coin Revisited: Christians and the Limits of Government (1996).
From Publishers Weekly: “These papers from a conference on the obligation of the Christian citizen to the state explore a variety of responses to Jesus' injunction to "render to Caesar the things that are Caesar's and to God the things that are God's." For example, University of Chicago professor of ethics Jean Bethke Elshtain examines the question of the emperor's sovereignty and the state's power through a reading of Dietrich Bonhoeffer's reaction to Hilter's state. The Cato Institute's Doug Bandow argues for the necessity of a limited government. Each chapter contains responses from all the conference participants with the end result being that Caesar's Coin constructs a meaningful dialogue among thinkers at all points along theological and political continuums."
Note: Al Mohler has also written an interesting essay addressing a particular angle of this topic.