The Game Players Of Titan by Philip K. Dick

In a near-future, postwar world, survivors find their lives rearranged around an obsessive, fate-deciding pastime administered by inscrutable visitors from elsewhere in the solar system; as people manipulate the game to gain power, lovers and opportunists lie, betray, and reinvent themselves, and chance evolves into an instrument of social control, the story satirically probes how external forces, compulsion, and shifting identities undermine free will, reshape relationships, and decide who will determine humanity’s future.

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