War has erupted across the Seven Isles. Alexander has recovered the Sovereign Stone, and much to his surprise, it has bonded to him, revealing the truth of his bloodline and his duty. He is the Seventh Sovereign of the Seven Isles and champion of the Old Law. Fleeing the wrath of Prince Phane, Alexander has traveled through the Reishi Gate to Ithilian in search of an alliance, only to discover that Ithilian is facing the threat of invasion as well. Alexander struggles to bring the army of Ithilian to his aid while secretly searching for information about his unique magical calling, information that he desperately needs if he is to have any chance against Phane. What he finds is beyond anything he imagined.
After gaining entrance to Blackstone Keep and recovering the legendary Thinblade, Alexander Ruatha must seek out the Sovereign Stone, and quickly. Contained within the ancient teardrop ruby is the secret of Wizard's Dust, the source of magic and the one thing that will ultimately decide the final battle of the Reishi War. Prince Phane will stop at nothing to lay claim to the Stone and with it the world. Sovereign Stone is the story of Alexander's struggle to retrieve the Stone from the aether where it's been lost since the Reishi Empire fell two thousand years ago and prevent Phane from learning the most dangerous secret in the Seven Isles.