The General Instruction of the Roman Missal, published here in its entirety, is the official directive for the actual celebration of the Mass of the Roman Catholic Church. It describes what is to be done in the celebration and why.
Dr. Ralph Keifer, a thoroughly American liturgist, teacher of liturgy at Chicago Theological Union and Notre Dame University, a father of three children, brings to his commentary a freshness and clarity that is rare in liturgical presentations. Deep faith, broad scholarship and contemporary experiences combine to produce both practical ideas (so practical, it's like a workbook) and a wealth of insights.
Both the General Instruction and Dr. Keifer's commentary focus on the needs of the pastoral musician and clergy who minister at the parish level. Clear, precise and practical.