More than one quarter of the world's people have little or no opportunity to hear the gospel. While few of the unreached care to investigate the claims of Christ, they are concerned about their own economic advancement. This is an opportunity for the gospel. On Kingdom Business proposes a new model for using business in missions: kingdom entrepreneurship. Kingdom entrepreneurs are "job-makers," starting for-profit businesses of all sizes- real businesses that meet real needs. On Kingdom Business provides a conceptual foundation for kingdom entrepreneurship and explores its contemporary development using case studies of kingdom businesses and reflecting on the lessons kingdom entrepreneurs have already learned.