Set in an alternative 1845 with France and Britain locked in a war for global supremacy. This is a steampunk adventure which introduces an alternative 19th century of giant airships, steam-powered automata, floating cities and giant mechanical birds. Napoleon still alive and aging threatens to invade Britain, his secret weapon a titanic airship. Can 18-year-old Lady Arabella West leader of the all-female aerial spies team the "Sky Sisters" save Britain.