Mark Ellingsen, a minister in the Evangelical Lutheran Church of America (ELCA), has been a professor of Church History at the Interdenominational Theological Center in Atlanta, Georgia, since 1993. He graduated magna cum laude from Gettysburg College (Pennsylvania) and Yale University, from which he received three master's degrees in divinity, arts, and philosophy, as well as his Ph.D. He has authored eighteen books including Sin Bravely: A Joyful Alternative to a Purpose-Driven Life (Continuum) and The Integrity of Biblical Narrative (Wipf and Stock). He and his wife have three grown children. When he is not writing or teaching, Ellingsen enjoys discussing politics, sports, and playing guitar.