Harold Ristau, Lutheran pastor and retired military chaplain, is an associate professor at Concordia Lutheran Theological Seminary in St. Catharines in Ontario, Canada. He is the author of several books, the two most recent of which are: My First Exorcism: What the Devil Taught a Lutheran Pastor about Counter-cultural Spirituality (2015) and At Peace with War: A Chaplain's Meditations from Afghanistan (2012).
