Stormchaser ( The Edge of Chronicles )

Stormchaser is the second book in the Twig Trilogy of The Edge Chronicles, co-created by authors Paul Stewart and Chris Riddell. It is an epic fantasy and action-adventure novel recommended for readers aged 9 to 14. The story follows 16-year-old Twig, a sky pirate, who stows away on a dangerous quest to harvest a rare, storm-born substance known as stormphrax