The award-winning Australian steampunk phenomenon.
Col lives on the Upper Decks of the juggernaut Worldshaker, a mobile city as big as a mountain. He has been chosen as next Supreme Commander - but then a girl Filthy escapee from Below appears in his cabin.
'Don’t let 'em take me!' she begs.
Will he hand her over, or will he break all the rules? Col’s safe, elite world is about to fall apart.