Gaea Trilogy Series by John Varley

When Cirrocco Jones, captain of the spaceship Ringmaster, and his crew are captured by Gaea, a planet-sized creature that orbits around Saturn, they find themselves inside a bizarre world inhabited by centaurs, harpies, and constantly shifting environments

ISBN moved from less recent editionOne of the greatest science fiction epics ever written, John Varley's Titan, Wizard, and Demon comprise a groundbreaking trilogy that will live forever. Human explorers have entered the sprawling mind of Gaea. Now they must fight her will. For she is much too powerful...and definitely insane...

ISBN moved from less recent editionThe satellite-sized alien Gaea has gone completely insane. She has transformed her love of old movies into monstrous realities. She is Marilyn Monroe. She is King Kong. And now she must be destroyed.