Kevin DeYoung (PhD, University of Leicester) is the senior pastor at Christ Covenant Church in Matthews, North Carolina, and associate professor of systematic theology at Reformed Theological Seminary, Charlotte. He has written books for children, adults, and academics, including Just Do Something; Impossible Christianity; and The Biggest Story Bible Storybook. Kevin's work can be found on clearlyreformed.org. Kevin and his wife, Trisha, have nine children.

Don Clark is an artist and cofounder of Invisible Creature, a widely respected and award-winning design studio based in Seattle, Washington. He has worked with clients such as Target, Pixar, NASA, The New York Times, LEGO, and Apple. Don and his wife, Erika, have three children and live on a small farm just outside Seattle.