Eckhard J. Schnabel (PhD, University of Aberdeen, Scotland), is the Mary French Rockefeller Distinguished Professor of New Testament Studies at Gordon-Conwell Theological Seminary, South Hamilton, Massachusetts.  He is the author of numerous books, commentaries, and essays, including Early Christian Mission, Paul the Missionary, and Der Erste Brief an die Korinther in the Historisch-Theologische Auslegung commentary series. Clinton E. Arnold (PhD, University of Aberdeen) is research professor of New Testament at Talbot School of Theology, Biola University in La Mirada, California. He has authored many books and commentaries, including Ephesians in the Zondervan Exegetical Commentary series and Acts in the Zondervan Illustrated Bible Backgrounds Commentary.