A Web of Air is a young adult post-apocalyptic science fiction novel by British writer Philip Reeve.

The clever young engineer, Fever Crumb, is swept up in a race to build a flying machine.

A Web of Air is the sequel to Fever Crumb, the story set centuries before Mortal Engines that tells how great cities begin to build giant engines to make their first predatory journeys across the wastelands.

It is set in Mayda, a city established in an atomic bomb crater off of mainland Portugal.

[1] Kirkus Reviews called the book "Imaginative, inventive and exciting.