Spacetime Donuts by Rudy Rucker

In a future where society is controlled by a totalitarian regime, a young computer hacker named Vernor Maxwell discovers a groundbreaking way to manipulate reality through a virtual world called "the Boppers." As he delves deeper into this digital universe, Vernor uncovers the potential to transcend human limitations and challenge the oppressive powers that be. His journey becomes a thrilling exploration of consciousness, technology, and the boundaries of human existence, as he seeks to liberate both himself and society from the constraints of their physical and mental prisons.

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