A Web of Air (9780545222174)

Called imaginative, inventive, and exciting in a starred review from Kirkus, the second adventure in the Fever Crumb trilogy is now in paperback.
Two years ago, Fever Crumb escaped the war-torn city of London in a traveling theater. Now, she arrives in the extraordinary city of Mayda, where buildings ascend the cliffs on funicular rails, and a mysterious recluse is building a machine that can fly. Fever is the engineer he needs -- but ruthless enemies will kill to possess their secrets. In this gripping sequel to Fever Crumb, master storyteller Philip Reeve creates a riveting story that is unforgettable and delightful at every fast-paced, breathless turn.