One of the major (and most challenging) tasks of an effective church leader is to guide a congregation through change, but what about the equally demanding calling to change the culture? That latter issue is the focus of author Os Hillman in his new book Change Agent: Engaging Your Passion to Be the One Who Makes a Difference (Charisma House). The author, who is president of Marketplace Leaders, believes it is important for Christians to make an impact on society is the areas of business, government, arts and entertainment, media, education and family, in addition to religion. He offers ideas for becoming a kingdom agent of cultural change.