Judith R. Blau, professor of sociology at the University of North Carolina, Chapel Hill, has written about the expansion of religion and church membership in the U.S.

Mark Nelson is district superintendent and team leader of the Missionary Church Florida Church in Auburndale, Fla., an evangelical organization that looks to multiply clusters of churches throughout Florida that can work together.

The Rev. Donald Paul Sullins is a former Episcopal priest who was ordained into the Catholic priesthood in 2002. He is an associate professor of sociology at the Catholic University of America in Washington, D.C., and has written about church switching and patterns of Protestant affiliation.

Manuel Ortiz, professor emeritus professor of ministry and urban mission at Westminster Theological Seminary in Glenside, Pa. Has focused his work on multicultural churches and the religious lives of American Hispanics.

The Rev. Edward P. Harding Jr. completed a new church start for the Presbyterian Church — Prince George’s Community Church in Springdale, Md., in 2000. He was formerly pastor of the Martin Luther King Jr. Presbyterian Church in Springfield, Mass.

Charles Ridley is professor of counseling psychology at Texas A & M University. Previously, he has taught at Indiana University and the Graduate School of Psychology at Fuller Theological Seminary. He is also licensed psychologist and Fellow of the American Psychological Association.

Professor of Hebrew Bible at the Hartford Seminary’s Center for Faith in Practice. He can discuss movements and trends in Korean-American Christian churches.

Book written by Hozell Francis. Provides both the theory and practice for raising up a church in today’s black community.

The Rev. Joe Samuel Ratliff is pastor of Brentwood Baptist Church in Houston. He is co-author of Church Planting in the African American Community. Contact him through his executive assistant, Vernastene J. Davis.