Natural Enemy of God

A storm is coming that'll turn the very world on its head; the second coming of Joy Boy. But how the hell is the world going to fare if his adoptive big brother is the son of the Storm Bringer. New world, new family, new enemies; same old Percy getting into trouble. OP!Percy *SPOILER WARNING* Making this up as I go along and I imagine I'll still be writing it 3 years from now.