Buster is not happy. Somebody, or something, is spoiling a perfectly good summer holiday by invading Smogley (again!).

Don't they know that Buster has better things to do?

He has a full schedule of not-going-to-school, biscuit-eating and Busterball.

He doesn't have time to save the world from rampaging ice-freaks - really, they could have asked.

This is the second in the hilarious series from "Mortal Engines" author, Philip Reeve.