James Wilhoit is Scripture Press Professor of Christian Education at Wheaton College in Wheaton, Illinois. He is the author of Spiritual Formation as if the Church Mattered, coeditor of the Dictionary of Biblical Imagery (IVP Academic) and coauthor, with Leland Ryken, of Effective Bible Teaching.
Dallas Willard was a professor at the University of Southern California's School of Philosophy until his death in 2013. His groundbreaking books The Divine Conspiracy , The Great Omission , Knowing Christ Today , Hearing God , and The Spirit of the Disciplines forever changed the way thousands of Christians experience their faith.