Underworld Kid {PJO X OC} - BOOK 3, TTC

Ashe Argentum has a lot on her shoulders.

For one, a few months ago, she found out that she was the reincarnation of Orpheus, the legendary musician from Ancient Greek myths, and she's destined to be with the reincarnation of Eurydice, who is very near. For two, she's currently on a undercover quest for her father, Hades, who has recently revealed that he has two secret children living in a military school. And for three, she's balancing all this with her new witchcraft lessons from the goddess Hecate.

Everything flips upside down when her friends from Camp--Percy, Annabeth, Grover, and Thalia--crash the party. Turns out, they were also on the lookout for her two half-siblings, though they thankfully don't know their parentage.

When the goddess Artemis is kidnapped by Atlas, she must venture to Mount Tamalpais to find and rescue her. But how will she manage her newfound sister along everything else?