The Edge Chronicles (abridged)

In the floating city of Sanctaphrax, fusty old professors scheme and bicker with each other as they study the weather in minute detail - mistsifting, fogprobing, researching the air blowing in from beyond the Edge. But some experiments are best left alone.

In the great floating city of Sanctaphrax, blizzards howl through the streets as the Edgeworld descends into an endless winter. Quint, the son of a sky pirate, has just begun his training at the Knights Academy - training that involves heading out over the Edge on tethers to develop his flying skills. But when Quint breaks the rules and head out to Open Sky on his own, he runs into the great sky leviathan known as a cloud-eater.

Young Twig lives in the Deepwoods, among the Woodtrolls, but he isn't one of them. In a brave attempt to find out where he belongs, Twig wanders into the mysterious, fascinating, and sometimes hazardous world beyond the Deepwoods. In his travels he encounters myriad peculiar creatures, like his wise guardian, the Caterbird; the Slaughterers, a peaceful race who butcher animals for their livelihood; and the vicious, bile-swilling Rotsucker.

Since his childhood in the Deepwoods, young Twig has always longed to soar above the forest canopy and explore the sky. Now a lowly crew member on his father's sky pirate ship, the Stormchaser, his dream seems fulfilled. But a much higher destiny awaits Twig as plots and treacheries from many years ago bring the lofty city of Sanctaphrax, home of the Edgeworld's most learned academics, to the point of disaster.

Far over the Edge, the Mother Storm is brewing: a storm more terrifying than any seen in the lifetime of any Edgelander. Sweeping in from the open sky, it must strike the source of the Edgewater River to bring new energy to the land. But in its way is Sanctaphrax: a magnificent city built on a floating rock and tethered to the land by a massive chain.

Rook Barkwater dreams of becoming a librarian knight - sent out to explore the mysteries of the Edgeworld. So when his chance comes, he grabs it. Breaking all the rules, he sets out on a journey to the Free Glades and beyond.

High in the crumbling Palace of Statues, oily Vox Verlix - nominally the Most High Academe but no more than a prisoner in reality - is brewing a terrible plot to destroy the goblins and the shrykes at a stroke, leaving him free to take over once again. Rook Barkwater, a young librarian knight, stumbles upon the truth when he is taken captive and forced to work for Vox. But can Rook foil Vox's plan and save the lives of his librarian colleagues?

Fleeing from the ruins of New Undertown, Rook Barkwater and his colleagues - the librarian knights, Felix Lodd and his banderbear friends - must lead the escaping population to a new life in the Free Glades. But perils aplenty are ahead for the crowd - not to mention some goblins with plans of their own. A dramatic and exciting conclusion to the Rook Barkwater sequence that takes the reader on a thrilling journey across the Edgeworld.