The Lazarus Effect

The Lazarus Effect (ISBN 0441475213) is a science fiction novel by Frank Herbert and Bill Ransom, first published in 1983.

Warning: Spoilers follow

The Lazarus Effect continues the story of the planet Pandora that began in The Jesus Incident. The sentient kelp is extinct, Ship is gone, there is no more dry land, the majority of humanity is heavily mutated from the genetic experiments performed by Jesus Lewis, and a power hungry mad man is attempting to control the planet. Fortunately the kelp is returning and this time Avata doesn't remain passive while people refuse to WorShip.