The Prophecy of Heroes; Just Us Mortals

Gaea's curse has made some serious affects on the 6. Turning them mortal. But not only that, an old friend comes back from the dead. Even if they do succeed in defeating her, what will happen? Will this friend have to go back? Or will she be allowed to stay? This is the sequel to the first Prophecy Of 6 book.

(I don't own any of these characters except for Erika, all rights to Rick Riordan, my cousin, @Kiodragon, and the 6)