Cluster
by Piers Anthony
Flint, green-skin carver from Outerworld, saves tribe from Old Snout dinosaur. The Empire forces his high Kirlian aura into alien bodies - wheeled Polarian, slave to insectoid Canopian, tri-sex Spica water world, on dragon to court emulating Elizabeth I. From Andromeda, conquerors bent on destroying the galaxy, follows equally brilliant enemy assassin - female.