A novel by Joan Cox
On the planet Eden, a terraformed paradise in the midst of a Hellenic Age one man hunts the supreme secret - that may be only a myth. He is Don Eel. Call him lover, dreamer, rebel, seer. Death-sentenced on his own world, rescued and led across wild and nomadic lands to the gleaming Citadel with its hidden ultramodern room - he alone can pass unscathed into the world of the blue-green skies and bustling spaceports, searching the galaxy for a treasure too close to see. He alone can unlock the mystery for which an ageless race lost their memories to save their lives.
Used availability for Joan Cox's Mindsong
April 1979 : USA Mass Market Paperback