Mark Everist & Thomas Forrest Kelly 
Cambridge History of Medieval Music [PDF ebook] 

Spanning a millennium of musical history, this monumental volume brings together nearly forty leading authorities to survey the music of Western Europe in the Middle Ages. All of the major aspects of medieval music are considered, making use of the latest research and thinking to discuss everything from the earliest genres of chant, through the music of the liturgy, to the riches of the vernacular song of the trouveres and troubadours. Alongside this account of the core repertory of monophony, The Cambridge History of Medieval Music tells the story of the birth of polyphonic music, and studies the genres of organum, conductus, motet and polyphonic song. Key composers of the period are introduced, such as Leoninus, Perotinus, Adam de la Halle, Philippe de Vitry and Guillaume de Machaut, and other chapters examine topics ranging from musical theory and performance to institutions, culture and collections.