Robertson McQuilkin served as the third president of Columbia International University for twenty-two years and is now president emeritus. His other books include Five Smooth Stones, The Great Omission, A Promise Kept and Life in theSpirit.

Paul Copan (PhD, Marquette University) is the Pledger Family Chair of Philosophy and Ethics at Palm Beach Atlantic University, West Palm Beach, Florida. He is author or editor of many books, including An Introduction to Biblical Ethics, Is God a Moral Monster?, and Is God a Vindictive Bully?