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Foundation's Triumph (1999) is a science fiction novel by David Brin, set in Isaac Asimov's Foundation universe.

Foundation’s Triumph starts with Hari Seldon who reviews his life and has to accept the fact that his “purpose” is completed. One day he meets a bureaucrat, Horis Antic, who explains his theory about the correlation of certain soils on planets and psychohistory. Seldon agrees on taking a trip to some of the planets which fit into Antic’s theory. Hari and Horis travel to Demarchia where they rent a yacht. Parallel to Seldon’s story Dors Venabili starts out on the planet Panucopia to meet Lodovic Trema, a robot whose Three Laws of Robotics have been erased. Lodovic gives her the head of R. Giskard Reventlov, an important robot who founded the Zeroth Law with R. Daneel Olivaw. She finds out that Giskard and Daneel never consulted a human while founding the Zeroth Law. Later Trema meets a faction of cyborgs and joins them. After Dors has become a rebel, she fights for the cyborgs as well. The third plot of the novel is on Eos. Daneel talks to his possible successor Zun Lurrin. An interesting point is that all chapters with Olivaw as the main character are written in a different font. During the flight to the first planet the yacht is taken over by rebels, who are from the renaissance or chaos planet Ktlina. They show Seldon ancient spaceships with many data capsules from the human past. Robots take over the yacht and destroy the data capsules and the ancient ships with the permission of Seldon. During the flight back to Trantor a rebel, Gornon Vlimt, turns out to be another robot from a faction of Calvinians, who want to send Hari into the future. At last all factions meet on Earth. The Calvinians are stopped by Daneel and Wanda Seldon. Old friends Seldon and Daneel meet one final time, to discuss philosophy. Despite the apparent eventual dominance of Galaxia, Seldon is cheerfully skeptical, confiding a belief that the second Galactic Empire will have both the Foundation, following his Seldon Plan, and Galaxia. He bets "Will there be an Encyclopedia Galactica a thousand years from now?", betting that if his belief is correct, there will be regularly-updated editions of it. Since most Foundation novels use the Encyclopedia as a framing device for its chapters, it seems that he may be correct.