This is the first book in the Arcana series by Morgan Llywelyn and Michael Scott. Llywelyn and Scott have set this novel, their first collaboration, in a semi medieval fantasy world. This concocted realm serves them exceptionally well as they layer shades of gray into the politics of their heroes while doing devilishly evil things with their amoral villains. Some of the most compelling evil magicians to appear in current fantasy are the Duet, a brother and sister team who use their incestuous relationship to raise evil magic and control the powerful Voids. Youthful hero Caeled loses his mother in the wake of one such display. As the stunned boy wanders away from his devastated village, he is rescued by a Seeker who believes he may be the Spoken One, a prophesied hero who will be able to wield the magical implements of the Arcana. But before the Seeker can safely deliver Caeled to his superiors, the pair are attacked by a weredog and the boy loses his hand. The Seeker takes him to the monks of Baddalaur where he is healed from his injuries. The monks use long dormant technologies to construct a prosthetic silver hand for the youth. It is constructed from knowledge long thought to be lost and holds great mystical power. They decide to educate him and train him to be able to battle the evil of the Duet. The years go by and finally the Duet attack and destroy the monks of the Baddalaur. Caeled then sets out to seek the Arcana with which he can hopefully destroy the Duet. This book is a good read but it does contain graphic violence as well as incestuous sex between the brother and sister that are the Duet.