This elegant volume—issued as part of the I Tatti Renaissance Library series—offers the Latin text and an English translation of a 15th-century treatise on music written by the musician and priest Florentius de Faxolis (1461–96). The editors, Bonnie J. Blackburn and Leofranc Holford-Strevens, also provide detailed notes to both the text and translation, an opening chapter that serves to introduce Florentius the man and his cultural context, a chapter on Florentius’s Latin, and a textual commentary that elaborates on some of the more significant or interesting points of theory contained in his Liber musices.