This fascinating account of the contents and function of the choirbooks of St Peter's church in Leiden has resonance far beyond the usual somewhat narrow focus of musicological studies of this period...this volume provides an important glimpse into some of the many treasures of music (as well as art) that fell victim to the religious zeal and, on occasion, the filching fingers of the Reformers of sixteenth-century Europe. As a study of the vibrancy and richness of the spiritual and musical life of the Catholic Netherlands at the time of the Reformation it is of great value.