Elven Star The Death Gate Cycle Volume 2 Margaret Weis & Tracy Hickman 1991
On steamy Pryan, never-ending sunlight and plentiful rain have created a jungle so vast that humans and elves dwell high in the trees and only dwarves live anywhere near the ground.
From the treetops the aristocratic elves sell weapons to the other races, whose incessant warfare sends a steady steam of profits and essential resources skyward.
