A guide to what happens at Mass and why. This book is divided neatly into six chapters focusing on: - the significance of the Last Supper and the origins of the Eucharist - the four separate parts of the Mass and the role and function of each - the different roles of both clergy and lay people when the Eucharist is celebrated - the physical arrangement of the church where Mass is celebrated - the technical terms used in relation to the Mass and the significance of these terms in the light of Catholic doctrine concerning the Eucharist - how the Mass changes us and enriches our lives. Each chapter provides a selection of resources for further reading.