Ned Bustard s a graphic designer, children's book illustrator, author, and printmaker. Books he has worked on include the It Was Good series, Squalls Before War: His Majesty's Schooner Sultana, History of Art: Creation to Contemporary, Every Moment Holy, and The Church History ABC's.

Tim Keller is the founding pastor of Redeemer Presbyterian Church in New York City, New York, and the author of The New York Times bestselling books The Prodigal God: Recovering the Heart of the Christian Faith, Prayer: Experiencing Awe and Intimacy with God, and The Reason for God: Belief in an Age of Skepticism

Charlie Peacock is a singer, songwriter, and record producer with a twenty-four year career in the music industry, including sixteen years in contemporary Christian music. In addition to recording his own albums, he has produced and written for numerous artists ranging from Amy Grant to The Civil Wars. He is the founder of a study center called The Art House and of Re: think Records. His first book is At the Crossroads: An Insiders Look at the Past, Present, and Future of Contemporary Christian Music.