In this book, Bent examines the words and music of motets from many different angles: foundational verbal quotations and pre-existent chant excerpts and their contexts, citations both of words and music from other compositions, function, dating, structure, theory, and number symbolism. Individual studies of these original creations tease out a range of strategies, ingenuity, playfulness, striking juxtapositions, and even subversion. Half of the thirty-two chapters consist of new material; the other half are substantially revised and updated versions of previously published articles and chapters, organized into seven Parts. With new analyses of text and music together, new datings, new attributions, and new hypotheses about origins and interrelationships, Bent uncovers little-explored dimensions, provides a window into the craft and thought processes of medieval composers, and opens up many directions for future work.