Gary R. Habermas (PhD, Michigan State University) is distinguished research professor and chair of the department of philosophy and theology at Liberty University in Lynchburg, Virginia.

R. Douglas Geivett is professor of philosophy at Talbot School of Theology, Biola University, in La Mirada, California. His previous books include Evil and the Evidence for God (Temple University Press) and (coedited with Brendan Sweetman) Contemporary Perspectives on Religious Epistemology (Oxford University Press).