Commentary on the Documents of Vatican II, Volume I (published by Herder and Herder) is the foundational English-language resource for understanding the Second Vatican Council (1962–1965). It provides historical context, theological analysis, and detailed paragraph-by-paragraph notes for the council's first four major texts.

Key Documents Analyzed in Volume I
Constitution on the Sacred Liturgy (Sacrosanctum Concilium): Outlines the principles for liturgical renewal, emphasizing the active participation of the faithful and allowing the use of vernacular languages in the Mass.
Decree on the Instruments of Social Communication (Inter Mirifica): Addresses the use and moral responsibility of the press, cinema, radio, and television in communicating the Gospel.
Dogmatic Constitution on the Church (Lumen Gentium): Explores the nature of the Church, highlighting the "People of God" concept, the collegiality of bishops, and the universal call to holiness.
Decree on Eastern Catholic Churches (Orientalium Ecclesiarum): Focuses on the rights, traditions, and autonomy of the Eastern Rite Catholic Churches in union with Rome.