Rattle the Bones (Vesik, #6)

An ancient horde. An enemy freed. A harbinger emerges.Much has been lost in the conflict with the Fae king and his allies. The most painful being the death of one of their own at the Mad King’s hand. A great Seal between realms may have been rebuilt, but vampires touched by darkness are slipping through the cracks.Damian's allies are many, but his enemies are terrible. Now the necromancer must prevent an attack unlike any the world has ever seen. Suddenly, the vampire god Camazotz is the least of his worries.