The Legends of Percy Jackson: Betrayed

When he was twelve he returned the lightning and the darkness.
When he was thirteen he cured the posioned barriers.
When he was fourteen he held the weight of the sky upon his shoulders.
When he was fifteen he conquered the labrynth.
When he was sixteen he saved the world.
When he was sixteen he freed death.
When he was sixteen he almost drowned.
When he was sixteen he walked through hell.
When he was sixteen he ended a millenium old feud.
When he was sixteen he saved the world again.
When he was sixteen he saw the truth.
When he was sixteen he left behind the only life he had ever known.