When Heaven Stands Open - Paperbackby Timothy Matthew Slemmons (Author) Liturgical Elements for Reformed Worship is a series of four liturgical resources: three consisting of liturgical elements for Years A, B, and C of the Revised Common Lectionary, and a fourth, the first such resource to support the implementation of Year D: A Quadrennial Supplement to the Revised Common Lectionary (Cascade Books). Each volume consists of a Call to Worship, Opening Prayer, Call to Confession, Prayer