Paperback, 521 pages

Published: 1993

In the sequel to "A Door into Ocean", the Sharers welcome to their world a race of extremely long-lived humans, the Elysians, through whose eyes is glimpsed the rich culture of the bubble city of Helicon.

The pristine city of Elysium floats on the water world of Shora, inhabited by 'immortals' who have succeeded in unlocking the secrets of life.

Outsider Blackbear Windclan wants to share the secret of immortality with his own people, but can he, and the City of Elysium, survive the corruption and decadence that immortality has bred into the ageless society.

And what of the consciousness of self-aware nano-sentient servitors and their quest for vengence?