Lionel Shriver, author of We Need to Talk About Kevin, and Mae Martin, stand-up comedian, talk with Harriett Gilbert about books they love. Lionel's is an American classic that's largely unknown in the UK - A Separate Peace by John Knowles. Mae's choice is a magical short story by HG Wells, The Door in The Wall, and Harriett introduces them to The Gathering, by Irish author Anne Enright