This commentary brings together a cadre of outstanding liturgical scholars to introduce, analyze, and conceptualize The Roman Missal and its new English translation. It is designed to situate these texts historically and theologically, to serve as a pastoral tool for leadership in the implementation and ongoing catechesis of this new translation, and to contribute to the ongoing development of vernacular worship for English-speaking Roman Catholics. Both encyclopedic and accessible, with a rich array of indices, this commentary is an unparalleled introduction and companion to the new Roman Missal in English.