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The Golden Torc (original 1981; edition 1982)
by Julian May
The Golden Torc by Julian May (1981)
References to this work on external resources.
Wikipedia in English
Amazon.com Product Description (ISBN 0330267191, Paperback)Exiled beyond the time-portal into the world of six million years ago, the misfits of the 22nd century are enmeshed in the age-old war of two alien races. In this strange world, each year brings the ritual combat between the Firvulag and the Tanu. This is the sequel to "The Many-Coloured Land".
(retrieved from Amazon Thu, 12 Mar 2015 18:16:34 -0400)
A small group journeyed through a time-gate into Europe's prehistoric past. Yet this supposedly unspoilt sanctuary holds two alien races locked in combat. In a world where the human-like Tanu have the upper hand, Elizabeth Orme soon encounters trouble. When they find she possesses rare mind powers, they want her for their own. She won't be used as a pawn in a Tanu versus Firvulag war, but Aiken Drum can't wait to get involved. Aiken discovers the Tanu's mind-enhancing torcs have given him his own powerful abilities. And it's not long before he devises a plan to challenge the Tanu's leader - for rule of the Many-Coloured Land itself. But another faction seeks the slaughter of all humans, and he stands in their path.
(summary from another edition)
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