Is BER-66 a human or a robot? His controllers, known as 'the Mechanism,' tell him he is a living machine, programmed to gather information on the inhabitants of the strange underground world he finds himself in. But as he penetrates its tunnels and locked rooms, encountering mysterious doppelgangers and a petrified city, he comes closer to the truth of his existence. (Orig. pb: 1973 / This ed. 2021)

Paperback : 336 pages

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