The King's Name by Jo Walton
The peace of the nation of Tir Tanagiri has been bitterly won. But after years of fighting against rival kingdoms and Jarnish invaders, the warrier Sulien ap Gwien and her lord King Urdo had finally won it, through great strength of arms - and greater strength of vision. For Sulien was inspired by Urdo's dream of a kingdom ruled by justice, whose subjects all were equal under a single code of law. But where many see a hopeful future for the land, others sense the seeds of a new tyranny. Soon the land faces civil war, and Sulien must take up arms once more. Where once her enemies were invaders and usurpers, now they are former comrades and loved ones. As the conflict tears her country and her family apart, and lifelong friends meet their destinies, Sulien must fight harder and harder to hold on to Urdo's shining dream. Continuing the epic begun in The King's Peace, this new novel in the saga of Tir Tanagiri brings the poignant and powerful story of Sulien ap Gwien to a rousing and deeply moving conclusion.