Triumvirate of Primordials series

The Triumvirate of the Primordials series was a fanfiction series that takes place shortly before in the Heroes of Olympus series: The Mark of Athena, Gaia feels a ripple move about the Earth as Ancient things begin to awaken again not seen since before the Rise and Fall of the Titans a year beforehand, Gaia soon finds herself face-to-face with her second Husband in all but name and his Husband's lover whom has awakened to destroy Poseidon and to reclaim his place in the world.

Main Characters:

 * Gaia
 * Tartarus
 * Pontos