Rise of the Titans

The seven have finally saved the world from primordial Gaea and you'd think that warranted a little rest.
But no ! Zeus and the Olympians have one last quest for the seven and oh ! as usual,the fate of the world rests on them(and Nico and Reyna).
PS - Thalia is dead (don't kill me)having sacrificed her life to save another hunter from a new threat.
Also Octavian here isn't dead.
He's much better than before, he's not as ruthless, and he hasn't killed Percy's panda pet in this story.