When 13-year-old Lily's inventor father vanishes after a Zeppelin crash, Lily's determined to hunt down the truth behind his disappearance, helped by Robert, the local clockmaker's son, and her wily mechanical fox Malkin. But shadowy figures are closing in and treachery lurks among the smoky spires of London - along with a life-changing secret. Be swept away by airships and flabbergasted by dastardly plots in this extraordinary and wildly imaginative debut, bursting with invention and adventure.