Intense and often transient relationships between artists and their muses are well established: Dalí had Gala, the pre-Raphaelites had Lizzie Siddal, Messiaen had Loriod. In Jeremy Cooper’s new novel, Discord, composer Rebekah Rosen has star classical saxophonist Evie Bennet. The story revolves around a series of meetings in 2022 and 2023 after Rebekah and Evie are brought together by a BBC Proms commission, ‘Distant Voices’.