Dying of the Light: by George R. R. Martin

Warlorn is slowly drifting through twilight to neverending night; as the planet sinks into darkness, so its inhabitants face annihilation. Seven years ago, on Avalon, Gwen was Dirk’s lover, his Guenevere; now she wears the jade-and-silver bond of Jaantony Riv Wolf high-Ironjade Vikary, a barbarian visionary, an outcast from his own people for his acts of violence.

And Garse Janacek, Jaan’s shieldmate, is also bound to Gwen – in hatred. Dirk, a rogue and a wanderer, is called to be saviour of the three who are bonded together in love and hate. But in breaking their triangle, he could lose all …