Kenneth Berding (PhD, Westminster Theological Seminary) is a professor of New Testament at Talbot School of Theology at Biola University and an elder at Redemption Hill Church in Whittier, California. He is the author of numerous books and articles, and he regularly blogs at Kindle Afresh and The Good Book Blog.

Keith R. Krell (PhD, University of Bristol) is the senior pastor of Crossroads Bible Church in Bellevue, Washington, and a former professor of biblical exposition at Moody Bible Institute, Spokane. He has served in pastoral ministry for more than thirty years. Keith coauthored Paul and Money and has contributed to several other books.