Part of a series that gathers notable scholarship on aspects of medieval music into one source, this volume presents 18 previously published articles on the music called ars antiqua, with separate sections on polyphony at Notre Dame of Paris, organum, conductus, and the motet. In his introduction, Roesner (New York University) describes these kinds of music, their development and history as an overview to the collection of 18 articles that follows. The articles are reproduced in facsimile of the original, with all the original notes, scores, and illustrations. An excellent index has been created for the volume, with the page numbers of musical examples noted in bold type. This is a superb resource, beautifully bound and published, that will be a necessary reference for students and scholars of music history and theory. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)