The Dawn Stag by Jules Watson

AD 81. Agricola, the ruthless governor of Roman Britain is intent on capturing the last unconquered territory in Britain - Alba: Scotland. Rhiann is an Alban priestess and princess who submitted to a political marriage to Eremon, an exiled Irish prince. Out of duty, grew love - a powerful and desperate love that will bind them together through conflict and betrayal. Now in them lies the hope of a nation. For Agricola's army is formidable - brilliantly armed and heavily supported. To the people of Alba it is a wall of steel and fire advancing across their homeland, bringing with it desolation. The predestined day draws near: the armies of Alba and Rome will meet in an epic battle to decide the fate of a country. Rhiann searches for guidance in the spirit world, little realizing how big a part she will play in this endgame. Eremon knows only that he must risk - and sacrifice - many lives, perhaps even his own...