Dr. Groothuis holds a Ph.D. in Philosophy (University of Oregon, 1993) and in the fall of 2024, he will become Distinguished University Research Professor of Apologetics and Christian Worldview at Cornerstone University. He is the author of twenty books, beginning with the best-selling Unmasking the New Age (InterVarsity Press, 1986) and including the popular and voluminous textbook, Christian Apologetics, 2nd ed. (IVP Academic, 2022), as well as a memoir, Walking Through Twilight: A Wife’s Illness—a Philosopher’s Lament (InterVarsity Press, 2017), an introduction to philosophy, Philosophy in Seven Sentences (InterVarsity, 2016), and a book on the controversial topic of Critical Race Theory, Fire in the Streets (Salem Books, 2022). He co-authored the introductory textbook on apologetics, The Knowledge of God in the World and in the Word (Zondervan-Academic, 2022) with Andrew Shepardson.