The Fighter by Jessica McCrory

When Dakota finally found the girl who disappeared from the house next door, he never would have imagined he would be taking the passenger seat of a war that spanned multiple worlds he hadn’t even known existed.

After spending every moment he wasn’t searching for Anastasia preparing for a battle he knew was coming, they finally find her. What they aren’t prepared for though, is the emotional damage she has suffered at the hands of their enemy.
Now as an attack is being launched against Terrenia, it is more important then ever for Anastasia to face her fears and control her magic. But when the line between illusion and reality is blurred, will she ever be able to find her way out of the dark?