The first book in the Book of Quint, part of the Edge Chronicles.
Fourteen-year-old Quint Verginix is the only remaining son of famous sky-pirate Wind Jackal. He and his father have journeyed to the city of Sanctaphrax - a great floating rock, bound to the ground below by a chain, its inhabitants living with their heads literally in the clouds. But the city hides a dangerous secret: deep inside the great rock, something horrible lurks.
With his father away, Quint may be the only one who can save Sanctaphrax from the dreaded curse of the gloamglozer...