Nocturne (The Fourth Talisman)

Nocturne, a wilderness of eternal night.
Solis, a wasteland of endless day.
Nazafareen is a Breaker, a mortal who has the rare ability to shatter spell magic—although her power carries a high price. With the memories of her former self erased and nowhere else to turn, she comes to Nocturne hoping to start a new life under the triple moons of the darklands.
But when an assassin forces Nazafareen to flee to the sunlit mortal city of Delphi, she finds herself embroiled in a deeper mystery whose origins lie far in the past. Why was the continent sundered into light and dark a thousand years before? And what really happened to the elegant but ruthless creatures who nearly reduced the world to ashes? The new Oracle might know, but she’s outlawed magic and executes anyone caught practicing it. Nazafareen must hide her powers and find a way out of the city—before it’s too late.
As the net slowly tightens, something ancient and vengeful begins to stir in the arid death zone called the Kiln. A dashing daeva named Darius is pursuing Nazafareen, but so are a multitude of enemies. War is brewing again. Can she stay alive long enough to stop it?