The Eternal Flame

Hayden, a Greek demigod, gets strange information about his Roman brother, Harley. Strangely, the younger Roman went missing, along with other demigods. Hayden, with his friends Erin and Sonic Boom, travel to Camp Jupiter. What happens, however, when they run into Nico and a boy named Josh? When things are more dangerous than they seem; are they only pawns for a bigger battle?