The tomb of shadows / Lerangis, Peter

Teens Jack, Aly, and Cass have already recovered two of the seven lost Loculi but now Marco is on the Massa side and their powers are still growing. When the friends find the next stop on their quest, they become involved in an epic battle, and might have to destroy the one thing they need to save themselves.

Teens Jack, Marco, Aly, and Cass begin a quest to find seven pieces of Atlantis' power that were hidden long ago and that will, if returned to Atlantis, save them from certain death due to the genetic abnormality that also gives them superior abilities.