Ian McEwan’s latest novel, “What We Can Know,” is many things at once: It’s a science fiction imagining of a future world devastated by climate catastrophe; it’s a literary mystery about a scholar’s ...

The novelist, who wrote about World War II in “Atonement” and has turned repeatedly to his own times, imagines the 22nd century in his new book, “What We Can Know.” The novelist, who wrote about World ...