KENNON L. CALLAHAN, -researcher, professor, and pastor-is today's most sought-after church consultant. He has worked with thousands of congregations around the world and has helped tens of thousands of church leaders and pastors through his dynamic workshops and seminars. Author of many books, he is best known for his groundbreaking study Twelve Keys to an Effective Church, which has formed the basis for the widely acclaimed movement of mission growth. Callahan has earned the B.A., M.Div., S.T.M., and Ph.D. degrees. His doctorate is in Systematic Theology. He has served both rural and urban congregations in Ohio, Texas, and Georgia and taught for many years at Emory University.