Norman L. Geisler (PhD, Loyola University) taught theology, philosophy, and apologetics on the college or graduate level for over 50 years. He served as a professor at Trinity Evangelical Seminary, Dallas Theological Seminary, and Liberty University. He was the co-founder of both Southern Evangelical Seminary and Veritas Evangelical Seminary (now Veritas International University). He was the Chancellor of Veritas International University and Distinguished Professor of Apologetics, and was President Emeritus of Southern Evangelical Seminary and Distinguished Senior Professor of Theology and Apologetics.

He is the author/coauthor of more than 100 books including I Don't Have Enough Faith to be an Atheist, Twelve Points that Show Christianity is True, The Big Book of Apologetics, Baker's Encyclopedia of Apologetics, When Skeptics Ask, When Critics Ask, From God to Us, A History of Western Philosophy, Defending Inerrancy, Systematic Theology, If God Why Evil, Philosophy of Religion, Christian Apologetics, and Biblical Inerrancy.