Alice Munro’s latest book is set to be her most successful yet. The reviews are rapturous, and it’s selling well. “So late in life,” she admits, it has occurred to her to stop writing. Working on Runaway, Munro was tempted by the idea, she says, of becoming a “normal person.” It hasn’t come down to that yet, because, for one thing, she thinks her best work is still ahead of her. “This, of course, is a fallacy that probably keeps you going,” she says