Terl Bryant is a drummer and author of A Heart to Drum, published in 2006. He lives in Great Britain.

Sister Donna Marie Beck is professor emerita and former director of music therapy at the Mary Pappert School of Music at Duquesne University in Pittsburgh, Pa. She is also a Catholic nun and the facilitator of a healing community drum circle.

Marc Anderson has a DVD/CD titled Drums in the Church: A Practical Guide for Percussion in Christian Worship. He teaches workshops and classes and is based in Minneapolis-St. Paul.

Bruce Adolph is the publisher of Christian Musician Magazine and Worship Musician! Magazine and produces the Christian Musician Summit conferences. He can discuss the role of drums in contemporary Christian worship. He is based in Puyallup, Washington.

Diana Garland, dean of the Baylor University School of Social Work, has conducted research about congregational social work and family ministry.

Samantha Jo Warfield is media contact for the Corporation for National and Community Service in Washington, D.C. 

Phil Zuckerman is a professor of sociology and secular studies at Pitzer College in Claremont, Calif. He is the author of The Nonreligious: Understanding Secular People and Societies.

Gregory Koukl is founder and president of Stand to Reason, an organization devoted to Christian apologetics and based in Signal Hill, Calif. He is also an adjunct professor of Christian apologetics at Biola University and has written in defense of faith against the arguments of the new atheists.

The Islamic University of Ghana is an institution of high learning that teaches in areas of business, communication, religious studies, information systems and law.