Daughter of Dragons — D. Alexander Neill

Lost in the depths of Dweorgaheim, surrounded by foes, Ally finds friends and allies in unexpected places. As she struggles to reach Underdarrow and the First Forge in order to keep her oath, names from her past reappear to aid her. Locked in a duel to the death with the unchecked hordes of an abomination from beyond the walls of the world, Ally struggles with love and loss, and begins to understand both the true nature and limitless scope of the power that lies within her, and just how costly realizing that power might be.