The Conviction of Things Not Seen: Worship and Ministry in the 21st Century (Brazos Press) is a festschrift (a collection of writings in honor of someone) for Robert Weber, a scholar who has written so effectively on worship. The book consists of a collection of essays on pastoral ministry, worship, cultural engagement and other topics, written by contributors like William Willimon, Donald Bloesch, Rodney Clapp and others. Readers will find interesting ideas to chew on.