The Supplement continues the tradition of the Catalogue in that it is designed as an aid for the church musician and or pastor seeking to plan unified worship services. It will also be of use to those church musicians who follow the Liturgical Calender and plan music appropriate to the appointed lessons, as well as a source for non-church choir directors who would like to locate choral settings based on a particular passage from Scripture.

The Supplement emphasizes music published since 1995, or titles that were overlooked in the previous editions. Entries are arranged from Genesis through Revelation. Each main entry citation provides the biblical reference (book, chapter, and verse), as well as a reference to additional passages from Scripture used in the anthem. The composer, arranger, or editor and the title are listed as they appear on the octavo. Information on voicing, solos, and instrumental accompaniment is noted; the name of the publisher, the most recent date of publication and the octavo number appear at the end of each citation, where information on instrumental parts, other versions of the same title, and collections where the work might appear are also listed. Composer and title indexes round off the work.