Carl F. George, one of North America's premier church growth consultants, has trained pastors, staff, and top executives from more than one hundred denominations. He is former director of the Charles E. Fuller Institute of Evangelism and Church Growth and former president of the American Society for Church Growth. His other books include Nine Keys to Effective Small Group Leadership. He and his wife, Grace, live near Greenville, South Carolina.
Warren Bird is research director for Leadership Network, the nation's leading catalyst for helping innovative church leaders move from ideas to impact. An ordained minister, he teaches at Alliance Theological Seminary. He is also author or coauthor of twenty-eight books, including Next: Pastoral Succession That Works. He and his wife, Michelle, live in a suburb of New York City.