A masterly account of a fraught relationship between Schoenberg (the teacher) and Wellesz (his pupil), set against the intellectual and musical currents of the day. Egon Wellesz studied music only briefly with Arnold Schoenberg but remained forever captivated by his personality. Yet, unlike Alban Berg or Anton Webern, he never wholly succumbed to his master but developed his own style: in the1920s he emerged as a distinctive opera composer,...