John M. Rottman is the professor of preaching at Calvin Theological Seminary in Grand Rapids, Michigan. He was ordained in the Christian Reformed Church and served two congregations in the Toronto ...view moreJohn M. Rottman is the professor of preaching at Calvin Theological Seminary in Grand Rapids, Michigan. He was ordained in the Christian Reformed Church and served two congregations in the Toronto (Canada) area. Most recently, he has become passionate about prison theological education and what God is doing in prisons.view less