From the back of the rulebook:
The world is flat, the sky is forever, and the Wind is. Everything. Every breath is a prayer and every exhale is a silent connection to all things. Welcome to WindZone.
It's time to learn a new mythology WindZone brings completely new ideas to the world or gaming. This book will introduce seven new races, each uniquely connected to the Wind. a literally endless world, new ideas about magic and technology, and completely different ways of thinking of life and death.
WindZone is flexible enough to allow players to choose any genre or time period Races include Felinoid (cat). Chiropteran (bat), Avian (bird), others that are land bound and still more that can fly using will power alone. These races inhabit mile high tree cities, sprawling megalopolises, cloud citadels, and floating islands in the sky