George Barna is the award-winning author of more than 45 books, including bestsellers such as Revolution, The Power of Vision, The Frog in the Kettle, and The Seven Faith Tribes. He is also founder of The Barna Group, a leading research firm that specializes in faith-related surveys. In 2009, George initiated Metaformation, a new organization designed to help people maximize their potential. George has led several churches and lives with his family in Southern California.

Harry R. Jackson Jr., author of The Warrior's Heart, is senior pastor of the 2,000-member Hope Christian Church located outside Washington, D.C. With a B.A. from Williams and an M.B.A. from Harvard, Jackson has been ordained a bishop by the Fellowship of International Churches. He and his wife, Michele, have two daughters and live in Bowie, Maryland.
George Barna currently serves as the executive director of the American Culture and Faith Institute, conducting research on governance, elections, worldview, and cultural transformation. He is the New York Times bestselling and award-winning author of more than fifty books, and his work is frequently cited as an authoritative source by the media. A frequent speaker at ministry conferences around the world, he has been on the faculty at several universities and seminaries. George and his wife, Nancy, have three adopted daughters and two grandchildren and live on the central California coast.