Shadows of the Realm — Dionne Lister

Bronwyn and Blayke are two strangers being drawn into the same war. Their world is facing invasion from the Third Realm. While they unknowingly move toward each other, they are watched, hunted, and sabotaged. When the Dragon God interferes, it seems their world, Talia, will succumb to the threat. Can they learn enough of the tricks of the Realms before it's too late, or will everything they love be destroyed?The young Realmists' journey pushes them away from all they've known, to walk in the shadows toward Vellonia, city of the dragons, where an even darker shadow awaits.