The Fallen One - The Sundered Lands Saga, #4

At the Knowing One's wishes, Nolyn Lirai is thrust into the overwhelming responsibility of being the Forentan mage council's second. Kiya na'Citali is a young mystic and a spiritwalker with the ability to cross the threshold of life and death at will. Now Nolyn and Kiya must work together and face the shadows that swallowed the lost city of Andar before an evil can revive age-old hatreds and destroy everything they hold dear.