The Adversary (Saga of Pliocene Exile, No 4)

This is the fourth book in "The Saga of the Exiles" series. The Frivulag are rising, while the children of the metaphysic rebels are to re-open the time gate - sole escape route back to the Galatic Milieu - and Marc Remillard, the adversary, takes up his destined role in the power play.