We open with Theo, our narrator, and Robin, his son, looking at the night sky through a telescope. ‘Darkness this good was hard to come by,’ Theo tells us. He calls Robin ‘my sad, singular, newly turning nine-year-old, in trouble with this world’.

We’re in the American Midwest, where Theo is a nerdy computer scientist — a data engineer whose professional world consists of looking for life on other planets.