Anna Zayaruznaya, The Monstrous New Art: Divided Forms in the Late Medieval Motet (Cambridge: Cambridge University Press, 2015). xvii + 301 pp. £69.99 (hb); £22.99 (pb). ISBN 9781107039667.Anna Zayaruznaya, Upper‐Voice Structures and Compositional Process in the Ars Nova Motet. RMA Monographs Series (Abingdon: Routledge, 2018). xv + 158 pp. £115 (hb). ISBN 9781138302440. (22nd April 2019) - Colton, Lisa