Mariella Frostrup talks to Marilynne Robinson about her new collection of essays, "When I Was A Child I Read Books", about faith, fiction and what it means to be a human being. Mature novelists Charlotte Rogan and Paul Torday discuss the pros and cons of debuting a first novel later in life. Writer and bookseller Jen Campbell shares her humorous collection of customers' extraordinary requests - a unique and affectionate insight into the world of bookselling and bookshops.