In Karl Ove Knausgaard’s spellbinding new novel, The Morning Star (Morningstjernen), we follow the fortunes of several protagonists—all living in various places in western Norway—over the course of a few warm days in August 2023 that will prove earth-shakingly momentous, not just for them but for all of humanity. Arne, a literature professor preparing to teach The Divine Comedy, is vacationing at a summer home with his three kids and his wife, Tove, a bipolar artist who’s entered a manic phase. Egil, Arne’s eremitic childhood friend, who has directed one documentary about a Christian fundamentalist sect and another (never completed) about a Satanic death-metal band, lives year-round on the road from Arne’s summer home and spends his time reading Nietzsche, Kierkegaard, and Heidegger.