The Emperor and the Alchemist’s Niece

Emperor Sigismund the Grim commands Lilath Kirnan, the mightiest fortress the world has ever seen, garrisoned by a quarter of a million men. No power in the world can bring him low; save only death. 

The Empire is wracked by rebellion and his body and mind have grown weary. Perhaps the Alchemist’s Niece holds the secret of everlasting life.