From the back of the book:
The inhabitants of the Warden are both numerous and varied, from androids to mutated animals, from sentient inorganic matter to wandering humans, from fey to humanoids, the disaster that is the Warden is a menagerie of chaos. Whether you fight them, treat with them, or just simply use them, is yours to decide. What lies herein is a generalized list of the creatures appearing in the Warden. What other creatures dwell there lies entirely in the purview of your imagination.