Margot Fassler, Cosmos, Liturgy, and the Arts in the Twelfth Century: Hildegard’s Illuminated Scivias, The Middle Ages Series. Philadelphia: University of Pennsylvania Press, 2023. xvii + 358 pp. + 16 colour plates. $65 / £54. ISBN 978 1 5128 2307 3 - Jennifer Bain (Plainsong and Medieval Music, 2025)