When pirates capture a cloudship and its crew, it is up to young Nadya and her friends, all orphans, to rescue the only family they have ever known.

Twins Arthur and Maudie Brightstorm undertake a perilous journey to uncover the truth about the death of their famous explorer father and his supposed sabotage of a competitor's expedition.

"Brought to the flying city of Highgate when he was only five years old, orphan Milo Quick has never known another home...A massive armada has surrounded Highgate's crumbling armaments. Because behind locked doors...the once-great flying city protects a powerful secret, hidden away for centuries...One small airship, the Halcyon, has slipped through the ominous blockade on a mission to collect Milo--and the rich bounty on his head--before the fighting...