Gerald R. McDermott, (2010), The Great Theologians (Downers Grove, IL: InterVarsity Press)
Gerald McDermott is professor of religion and philosophy at Roanoke College in Salem, Virginia and a teaching pastor at St. John Lutheran Church. In this brief survey he introduces eleven theologians which he considers to have contributed significantly to the development of theology. These theologians are Origen, Athanasius, Augustine, Thomas Aquinas, Martin Luther, John Calvin, Jonathan Edwards, Friedrich Schleiermacher, John Henry Newman, Karl Barth and Hans Urs von Balthasar.
His approach is very useful. He first introduces them by giving a short theological biography about them, then highlights several main features of their theological contributions and then focuses on their main contribution. I find this very useful as a primer for non theologians and for people who wants to know more about theology but are afraid to ask.