Currently writing a commentary on the Gospel of Luke for the Pillar New Testament Commentary Series (Eerdmans).
Books include: The Hebrew Gospel and the Development of the Synoptic Tradition (Eerdmans, 2009); Is Jesus the Only Savior? (Eerdmans, 2005); The Divine Intruder (NavPress, 2000).
Commentaries include: commentary on Hebrews in Renovare Study Bible (Harper, 2005); commentary on Romans in New Interpreter's Study Bible (Abingdon, 2003); commentary on The Gospel of Mark, PNTC (Eerdmans, 2002); commentary on Romans, NIBC (Hendrickson's 1992).
Also publishes numerous articles in scholarly and popular journals, and is a frequent speaker at churches, conferences, and lectureships.
Named by the Presbyterian Church (U.S.A.) to the task force for the revision of the Heidelberg Catechism (2009-2010).
Member of the Center of Theological Inquiry, Princeton, N.J. (2007). Recipient of several teaching awards, including Outstanding Professor at Jamestown College and Whitworth University; former scholar for North Dakota Humanities Council; recipient of Templeton Grant in Science and Religion (1996); recipient of Deutsche Akademische Austausch Dienst Award (1993).
Leader of study programs to Luther's Germany; church struggle in Germany; ancient Christian sites in Turkey; historical geography of Israel and Palestine.
Ordained minister, PCUSA. Contributing editor of Christianity Today. Climbed the Mittellegi Ridge of the Eiger in 2003.