The Dreaming (The Dreaming #48)

Deep beneath the city streets, in the abandoned filth of underground New York, the Cluracan and his nemesis battle their way through the blood-thirsty hordes of the Unseelie Host in a desperate attempt to save their sister, Nuala. But are the combined forces of the Cluracan, his nemesis and Thessally strong enough to save Nuala from her own dark thirst for revenge?