The clockwork sky

Erasmus Croach's miraculous factory, Ember, has flooded London with steampowered automatons. Meanwhile, Sally Peppers, Croach's headstrong and brilliant niece escapes her overbearing governess and joins a no-rules road rally through the slums, Croach sends Sky to bring her back, preferably alive. Together, the impulsive Sally and the naive Sky crash headlong into a mystery involving rogue automatons prowling the sewers, children disappearing without a trace, and a dark secret so big it could overturn all of London. But the biggest mystery of all is why Sky is the first robot who can dream....