The Blood King (Chronicles of the Necromancer, #2)

This is the second installment of the Chronicles of the Necromancer.

Having escaped being murdered by his evil brother, Jared, Tris must take control of his magical abilities to summon the dead, and gather an army big enough to claim back the throne of his dead father. But it isn't merely Jared that Tris must combat. The dark mage, Foor Arontala, has schemes to raise the Obsidian King.