Atlantica

Allied with the Dark Clans, the fabled cities beneath the seas had become all but invincible. But when the Aquarian King turns up dead, and his only heir and Prince goes missing, Atlantica hovers on the brink of civil war with the new Queen caught in the middle. As a new evil rises from the depths of Atlantica's arcane past, Carissa, Parker and Brayden find that even being a reborn god cannot deliver you from clutches of murderous foes that work from the shadows. With time running out and the Atlantean Senate bent on impeaching the Dark Queen for treason, their only hope is to descend into the depths with the one key that will unlock the secrets of not just the ancients, but the hidden power of the long-dead high god of Atlantis himself-Poseidon!