My guest this week is a sometime musician – and as a result he’s another writer who finds that music is not a background but his master. His novel is a hard-edged story about a childhood event whose consequences are poisoning the characters many years later, and the soundtrack is a double-barrelled mix for the past and present timelines. Expect 1970s grit and modern-day anguish – with a dose of catharsis from Sigur Ros. He is Andrew Lowe and he’ll be here on Wednesday with his Undercover Soundtrack.