James Patrick Hogan Thrice Upon a Time

ISBN 13: 9780671319489

Thrice Upon a Time

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9780671319489: Thrice Upon a Time
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Murdoch Ross is delighted when his brilliant grandfather invents a machine capable of sending messages to itself through time to the past or future, but soon messages begin to arrive that the machine did not send, including one warning of the imminent destruction of the world. Reprint.

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From the Inside Flap:

was summoned to his grandfather's isolated Scottish castle, he had no idea of the old man's latest discovery -- nor where it would lead him. Sir Charles, a genius in far-out physics, had found a flew in the law of conservation of energy; in any process, an incredibly tiny increment of energy escaped -- back through time! Using this "tau" radiation, he could send messages into the past.
But Murdoch discovered records of messages he knew he had never sent. Were many futures possible? Could a message from Future X alter the past -- and thus wipe out Future X? But who would be foolish enough to send a message that could eliminate his own existence?
Then disaster struck. An advanced fusion reactor threatened to destroy all Earth. Grimly, Murdoch sat down to send back the words that would destroy everything he had learned to love.

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James P. Hogan
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