Wars of Dar'ryn - Sam Whittaker - Bog

A devastating war is about to break out.
The champions have uncovered an unspeakable secret that changes everything. But even worse, one of them has been taken prisoner. And if they can't rescue their companion from the iron grip of their ancient evil enemy, the whole star system will be plunged into ruin.
They must face him together, or fail. But now, they have a powerful new ally who has finally emerged from hiding. But is he everything they hoped for?
Yet before they can make their final stand, they have to bring together three divided peoples and forge them into an army. If they can't do all of this in time, all life in the system will either die or be corrupted into mindless slaves.