Delver Magic Book XIII — Jeff Inlo

Ryson Acumen discovers a secret within the Sword of Decree. As he investigates the history of the blade's enchantment, an army of dark creatures invades the land of Uton. When he returns to his home, he learns of a treacherous plan to weaken his friends and destroy the ghost of Sy Fenden. Even the demon lord Rul Saattan has a hand in the plot, and the delver is forced to confront a powerful magic caster.

When Ryson finally understands the depth of the deception, he realizes he must set upon a difficult path to save the people of Burbon and restore hope to the land of Uton. He must learn to trust those around him as the challenges grow beyond the limits of his skills and senses. He discovers the importance of conviction even as many long held beliefs face an unprecedented attack.