Book excerpt: ..."" excellent work... "" --Musicological Research ""Dolores Pesce has now provided reliable and more comprehensive coverage of the available theoretical material, and her books should be consulted by all interested in the subject."" --David Hiley, Music and Letters For the first time, Dolores Pesce brings together theoretical perspectives on the concept of affinities, or pitch relationships, in musical treatises of the Middle Ages and the Renaissance.