Sam HamstraSam Hamstra Jr. is an Affiliate Professor of Worship and Church History at Northern Seminary (Lombard, Illinois), as well as founder and leader of ChapterNext, a Chicagoland-based pastor search firm and church consultancy dedicated to helping congregtions open new chapters of dynamic and life-transforming ministry. A veteran pastor, worship leader, and musician, he is also author of Principled Worship (2006). Read More Read Less