Betrayal: A Tempest Story

WARNING: If you have NOT read Tempest or Nebula by @/megswriting, this contains spoilers!
When Tessa and her friends learn after the attack on Camp Jupiter that Mark has been turned to the Regiment, Dale knows that she must go after him. He's her best friend! She's determined to get him back. And to do that she must face the very thing that hides the evil that took Mark- the Labyrinth.
But when the child of Demeter disappears behind the steel door with the blue delta, she ends up with a lot more then she expected.