Author:
Michael A. Harbin (ThD in Old Testament and Semitic Studies, Dallas Theological Seminary) is professor emeritus of biblical studies at Taylor University with thirty years of teaching experience.
Mark C. Biehl (DVM, University of Illinois) serves as lead pastor of Upland Community Church, bringing a unique background with twenty-two years in veterinary medicine. He graduated from Trinity Evangelical Divinity School and completed a ministry residency at College Church in Wheaton.