In “Termush,” the Danish writer Sven Holm’s 1967 novella, the worst has happened: Nuclear war has engulfed the planet, and it’s assumed that anyone not already dead shortly will be. But some small portion of the population — rich, paranoid or desperate — still lives in the relative luxury of a grand hotel estate called Termush. They’ve paid deposits against the apocalypse for years, and the hotel’s management has put their money to extensive use, digging bunkers, installing radiation sensors, and putting aside years’ worth of food, drink and medicine.