The way Shani Boianjiu tells it, it was a fluke that she wrote her first book in English. In fact, when she wrote the stories that make up “The People of Forever Are Not Afraid” as a college senior, she didn’t really imagine a book coming out at all, much less a handsome hardcover volume from Hogarth, a prestigious new imprint of Random House, that was heralded by the publication of one of its chapters in The...