Robert Barron (STD, Institut Catholique de Paris) is auxiliary bishop of the Archdiocese of Los Angeles. He founded Word on Fire, a Catholic ministry of evangelism, and previously served as rector of Mundelein Seminary and president of the University of Saint Mary of the Lake. Barron has written numerous books, including Catholicism (over 100,000 copies sold), Exploring Catholic Theology, The Priority of Christ, 2 Samuel in the Brazos Theological Commentary on the Bible series, The Strangest Way: Walking the Christian Path (winner of a Catholic Press Association Book Award), and Heaven in Stone and Glass.