In part four of This Writing Life's conversation with Rick Bass, whose new book For a Little While (Pushkin) on 2017's Story Prize, we talk about his love of the short story, and why it is the most human of literary forms. We return to the relationship between Bass's environmentalism and his writing, before skipping off again onto nature writing and finally the difference between optimism and hope in Bass's conception of humankind. Buried somewhere in all this, Bass refuses to talk about his new novel. 'It's an old writer's taboo...'

The fifth and final part to follow next week.