Dragontiarna: Wraiths (Dragontiarna #4)

Ridmark Arban is the Shield Knight of Andomhaim, and he has always gone into battle alongside the deadly Third of Nightmane Forest.

But now Third finds herself trapped in a strange new world of deadly magic.

Unless Third learns to master the dangers of this new world, they will destroy her.

Or the Heralds of Ruin will find her and kill her...