Book excerpt: Three hundred years ago, Roone, the legendary Artefix, put an end to the vicious war between Erethia and Pyria. Now, childhood friends Lyra and Adax must navigate the depths of their abilities, and decide where their loyalties lie: with their homeland, mighty Erethia, or Pyria, land of myth? But much like Erethia's citadel, power is not always what it seems. Are they ?