Britten's Ambiguities; Tippett's Times; Metzer's Borrowings - Philip Rupprecht, Britten's Musical Language. Cambridge: Cambridge University Press, 2001. viii + 358 pp. ISBN 0 521 63154 8. - David Clarke, The Music and Thought of Michael Tippett: Modern Times and Metaphysics. Cambridge: Cambridge University Press, 2001. xii + 343 pp. ISBN 0 521 58292 X. - David Metzer, Quotation and Cultural Meaning in Twentieth-Century Music. Cambridge: Cambridge University Press, 2003. viii + 230 pp. ISBN 0 521 82509 1.