Expose, Book 8, The Thaw Chronicles — Heidi Catherine

Only the chosen shall seek. They were meant to bring Askala to the world. Now the war is coming to Alaska. Sam, Hawk, Luca and Mercy must return home to protect the society they were bred to champion. But how do they defend peace loving Askala from the greatest threat yet? As secrets are revealed and loyalties are tested, everyone will be forced to question who is friend and who is foe. The Commander is far more dangerous than anyone realized. The Outlanders are divided about whose side they're really on. And Askala is unprepared for an attack. In the ocean separating the two world, the final battle will decided the future of not only Askala, but who will control the Newlands. Sam, Hawk, Luca and Mercy will have to accomplish the impossible - unity.