Alternate chapters follow teenagers Todd and Viola, who become separated as the Mayor's oppressive new regime takes power in New Prentisstown, a space colony where residents can hear each other's thoughts.

As a world-ending war surges to life around them, Todd and Viola face monstrous decisions, questioning all they have ever known as they try to step back from the darkness and find the best way to achieve peace.

Bell has spent his whole life--all eleven years of it--on Mars. But he's still just a regular kid--he loves cats, any kind of cake, and is curious about the secrets the adults in the US colony are keeping. Like, why don't they have contact with anyone on the other Mars colonies? Why are they so isolated? When a virus breaks out and the grown-ups all fall ill, Bell and the other children are the only ones who can help. It's up to Bell--a regular kid...