The World Jones Made — Philip K. Dick

A psychic man has the power to change a post-apocalyptic world in this science fiction novel from the author of Solar Lottery.
 
Precognition; a world ruled by Relativism; giant alien jellyfish. The World Jones Made is a classic Philip K. Dick mash-up, taking deep philosophical musings and infusing them with wild action
 
Floyd Jones has always been able to see exactly one year into his future, a gift and curse that began one year before he was even born. As a fortune-teller at a post-apocalyptic carnival, Jones is a powerful force, and may just be able to force society away from its paralyzing Relativism. If, that is, he can avoid the radioactively unstable government hitman on his tail.