David Kinnaman is coauthor of unChristian, You
Lost Me, and Good Faith. He is president of Barna Group,
a leading research and communications company that works with
churches, nonprofits, and businesses ranging from film studios to
financial services. Since 1995, David has directed interviews with
more than one million individuals and overseen hundreds of U.S. and
global research studies. He and his wife live in California with
their three children.
Mark Matlock has been working with youth pastors, students, and parents for more than two decades. He is the principal at WisdomWorks a consulting firm dedicated to helping individuals, churches and faith-centered organizations leverage the transforming power of wisdom to accomplish their mission. Mark is the former executive director for Youth Specialties (YS) and creator of the PlanetWisdom student conferences. He has written more than twenty books for teens and for parents. In addition, Mark serves as a teaching pastor at Irving Bible Church. Mark and his family live in Texas.