Theologian of Christian Witness

Speaking of helpful secondary literature, Joseph Mangina has written a fine introduction to Karl Barth. The book is called Karl Barth: Theologian of Christian Witness. This, however, is not just one more introduction to Barth, it also brings his thought into dialogue with other (mostly) contemporary theologians, namely George Lindbeck, Robert Jenson, Henri de Lubac, Stanley Hauerwas, and Michael Wyschogrod.