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.
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