My guest this week says he is much concerned with reinvention. He’s spent his life setting himself challenges to embrace new careers, lifestyles, places to live – and the latest of those reinventions is being a novelist. His debut title is a story of 1970s Glasgow and required some daring imaginative reinventions – not least, writing in the voice and psyche of a 22-year-old woman. A soundtrack was essential – Tangerine Dream to soothe and order the brain; Pink Floyd, Bob Dylan and David Bowie to restart the period – and provide other wisdom besides. He is Glyn Harper – writing as GD Harper – and he’ll be here on Wednesday with his Undercover Soundtrack.