Liz Jensen dropped into Arc’s offices to discuss her new book The Uninvited, an accessible and very frightening vision of ecological and political crisis.

“I thought about John Wyndham a lot,” she says, “and the ways he found to tell a complex, global story from a single, intimate point of view.” The result is chilling. Across the world, children are killing their families. The experts say it’s an isolated incident – and they’re wrong.