“Station Eleven” author Emily St. John Mandel on an interminable book tour, starting a family, and coming to terms with an adopted country that has guns — lots of guns. “That day there were two school shootings, in different states. That night I lay awake in Room 627 while the baby fluttered and kicked. Please be okay, I thought. I know I can’t save you from every danger but just come to us safely, my beloved, my daughter, and we’ll try to protect you in this terrifying country.”