Book excerpt: The Reader's Guide to Music is designed to provide a useful single-volume guide to the ever-increasing number of English language book-length studies in music. Each entry consists of a bibliography of some 3-20 titles and an essay in which these titles are evaluated, by an expert in the field, in light of the history of writing and scholarship on the given topic. The more than 500 entries include not just writings on major composers in music history but also the genres in which they worked (from early chant to rock and roll) and topics important to the various disciplines of music scholarship (from aesthetics to gay/lesbian musicology).