This is a learned and well-written volume by a highly experienced scholar whose research in both primary and secondary sources is exceptionally wide, deep, and up-to-date. The geographical breadth and textual depth of this survey, which includes not only major and less well-known figures and texts on canon law and theology but also sermons, manuals for preachers, legislation of church councils and synods, visitation records, rulings of individual prelates, saints' lives and more, gives this study a range that puts it in a class of its own, with a coverage not found in previous treatments of its subject."" - Marcia Colish, author of Faith, Fiction, and Force in Medieval Baptism Debates