Nikolaus Harnoncourt wrote influential essays and lectures about historical performance, musical rhetoric and the responsibilities of interpreters. Baroque Music Today: Music as Speech argues that much early music should be understood through gesture, articulation and rhetorical language rather than played according to later Romantic habits. The Musical Dialogue and later collections extend his thinking into Bach, Mozart, Beethoven and other repertoire, showing how questions of instruments, phrasing and notation affect meaning in performance. Harnoncourt's prose is argumentative, practical and rooted in decades of conducting and playing rather than detached musicology. His work fits historically informed performance, Baroque and Classical music, and conductor writings, especially for musicians and listeners interested in why performance style changes across periods. Read more Less