Ad lit.org: Reading Discussion Guide: The Last of the Sky Pirates

Fifty years after Captain Twig severed the anchor chain securing the floating rock of Sanctaphrax to Undertown, all is not well in the great floating city or the urban sprawl of Undertown. Rook Barkwater is selected as a Librarian Knight elect, and seeks to train in the Freeglades. Along the way, Rook encounters personal failure, betrayal, and near death. Rook ventures out into the Deepwoods to continue his studies, and he meets the famous sky pirate, Captain Twig. Together, they journey back to Undertown in the Skyraider to stage a dramatic rescue mission atop the horrible Tower of Night.