The Heidelberg Catechism is one of the world's foremost and prevailing Christian faith documents throughout the centuries, due to its intellectual clarity as well as personal style. At the same time, the book invites the reader to engage the Heidelberg Catechism in conversation with contemporary Christian faith.Margit Ernst-Habib aims not only at describing the traditional uses of the HC in churches so far, but also at engaging the reader on different levels, and eventually enabling him or her to begin answering the vital question: "But why are you called a Christian?"