David Stark is the director of Changing Church through Prince of Peace Lutheran Church in Burnsville, Minnesota. The founder and director of training for Church Innovations, he has led dozens of workshops and seminars throughout the United States and has developed masters for small groups that are used by churches from a variety of denominations. David holds an M.Div. and has published a number of resources, including the LifeKeys books, for groups. He lives in Minnesota with his wife and two sons.

Betty Veldman Wieland was introduced to small groups through a women's Bible study. The experience ignited her passion for God's Word and led her to leadership positions in Christian Reformed Home Missions' small group ministry. Betty has two adult sons and she and her husband live in Michigan.
David Stark (davidstarkcollective.com) is president of BusinessKeys International, a consulting practice that serves churches as well as businesses. A former pastor, he has worked with churches for more than twenty years, focusing on strategy, leadership, small-group ministries, and lay empowerment.

For businesses, he specializes in strategy, leadership, and culture issues. David's previous books include LifeKeys: Discover Who You Are and Christ-Based Leadership. He and his family live in Minneapolis.
Betty Veldman Wieland was introduced to small groups through a women's Bible study, which led her to leadership positions in Christian Reformed Home Missions small group ministry. She and her husband live in Michigan.