This book seeks to help Christians from different traditions understand the mechanisms that have given rise to their diversity, to help them learn how to understand and appreciate each other in their difference and, also offer practical guidelines which will enable disparate Christians to work and worship together in a common mission; to worship God and to make Him known.

This book was published in 2003. One of the most important but least studied of medieval chant repertories is that of the Kyrie. With their Latin texts, Kyrie melodies represented musical ambitions manifested alongside of and subsequent to Gregorian chant - ambitions which achieved stylistic and formal distinction. This study illuminates those features of the early Kyrie that give it its distinctive character and set it apart not only from Gregorian chant but also from other types of medieval chant. The repertory focused on in this book is a group of 22 West Frankish sources which are believed to have originated in several Aquitanian locations. The tradition represented by these manuscripts and their repertory of Kyrie melodies can be followed across a century and a half, from 950 to 1100. The Aquitanian manuscript tradition is significant because these sources represent by far the largest group of closely inter-related musical sources from the period, and the musical notation gives reliable indication of pitch up to a century earlier than other manuscripts of the time.

This book is for Roman Catholic and Evangelical Protestant lay people who wonder what relationship, if any, they might have with their friends who come from a different Christian faith tradition than their own. The authors aim to address that question in a practical way. They believe that while disagreements remain, it is possible to preserve the integrity of the faith while relating positively to Christians who cherish other beliefs. The opinions expressed in this book grew out of nearly thirty years of experience as evangelical protestant missionaries ministering in catholic parish communities in France. The goal of the book is to move the readers beyond simply understanding each other, to a place where they might begin using their diversity to stimulate and encourage each other in our common pursuit of obedient discipleship. We know of no other book which targets ecumenical lay relations in this way.