Hardcover. Quarto. Seven Volumes in eight. This edition, undertaken by an international team of scholars working under Professor Edward H. Roesner, presents the Parisian liber organi in all its richness and diversity for the first time in a complete modern edition. All volumes of this important project bound in black cloth with mounted color plate illustration on cover, and including musical scores and some illustrations. All but Vol I still shrink-wrapped and all in very fine, as new condition apart from some very slight rubbing to covers of Vol I. Individual volumes as follows:

Volume I: Les quadrupla et tripla de Paris. Édition étabie par Edward H. Roesner. Édition des plains-chants établie par Michel Huglo. Le Magnus Liber Organi de Notre-Dame de Paris, I. Monaco, 1993. 4º. 358 pp. Critical edition of the 3- and 4-voice Notre Dame organa. Cloth. 

Volume II: Les organa à deux voix pour l’office du manuscrit de Florence, Biblioteca Medicea-Laurenziana, Plut. 29.1. Édition établie par Mark Everist. Le Magnus Liber Organi de Notre-Dame de Paris, II. Monaco, 2004. 4º, xci, 332 pp. Critical edition of the 2-voice Notre Dame organa for the Office from Ms Florence plut. 29.1. Cloth. 

Volume III: Les organa à deux voix pour la messe (de noël à la fête de Saint-Pierre et Saint-Paul) du manuscrit de Florence, Biblioteca Medicea-Laurenziana, plut. 29.1. Édition établie par Mark Everist. Le Magnus Liber Organi de Notre-Dame de Paris, III. Monaco, 2001. 4º, xxix, 258 pp. Critical edition of the 2-voice Notre Dame organa for the Mass (part 1) from Ms Florence plut. 29.1. Cloth.

Volume IV: Le organa à deux voix pour la messe (de l’Assomption au commun des Saints) du manuscrit de Florence, Biblioteca Medicea-Laurenziana, plut. 29.1. Édition établie par Mark Everist. Le Magnus Liber Organi de Notre-Dame de Paris, IV. Monaco, 2003. 4º, xxix, 251 pp. Critical edition of the 2-voice Notre Dame organa for the Mass (part 2 from Ms Florence plut. 29.1. Cloth. 

Volume V: Les clausules à deux voix du manuscrit de Florence, Biblioteca Medicea-Laurenziana, pluteus, 29.1. Édition établie par Rebecca A. Baltzer. Le Magnus Liber Organi de Notre-Dame de Paris, V. Monaco, 1995. 4º. 393 pp. Critical edition of the 2-voice Notre Dame clausulae from Ms Florence plut. 29.1. Cloth

Volume VI a: Les organa à deux voix du manuscrit de Wolfenbüttel, Herzog August Bibliothek, Cod. Guelf. 1099 Helmst. Édition etablie par Thomas B. Payne. Vol. 1. Le Magnus Liber Organi de Notre-Dame de Paris, VIa. Monaco, 1997. 4º. Critical edition of the 2-voice Notre Dame organa (part 1) from W2. Cloth.

Volume VI b: Les organa à deux voix du manuscrit de Wolfenbüttel, Herzog August Bibliothek, Cod. Guelf. 1099 Helmst. Édition etablie par Thomas B. Payne. Vol. 2. Le Magnus Liber Organi de Notre-Dame de Paris, VIb. Monaco, 1997. 4º. 402 pp. Critical edition of the 2-voice Notre Dame organa (part 2) from W2. Cloth. 

Volume VII: Les organa et les clausules à deux voix du manuscrit de Wolfenbüttel, Herzog August Bibliothek, Cod. Guelf. 628 Helmst. Édition établie par Edward H. Roesner. Plain-chants établis par Evan Angus MacCarthy et Greta-Mary Hair. Le Magnus Liber Organi de Notre-Dame de Paris, VII. Monaco, 2009. 4º, lvii, 394 pp. Critical edition of the 2-voice Notre Dame organa from W1. Cloth. 

The Magnus Liber Organi was composed for the cathedral of Notre Dame, Paris, during the brilliant cultural Renaissance of the twelfth century and the first decades of the thirteenth century. The work of Leoninus and other musicians, it may be considered as the greatest single achievement in the development of early polyphony. The revision and renotation of the Great Book by Perotinus and his contemporaries were equally important; the creation of the three- and four-voice organa (the earliest known examples of music for more than two voices) is one of the most extraordinary moments in the development of Western polyphony.