Explain what percy’s prophecy really meant in the lighting thief

You shall go west, and face the god who has turned,

You shall find what was stolen, and see it safely returned,

You shall be betrayed by one who calls you a friend,

And you shall fail to save what matters most, in the end.

Explanation:

The first line, refers that Percy needed to go west with his friends (Grover and Annabeth) to meet with Hades because the Olympians thought he was the one who stole the bolt. The second line, refers that Percy will find the master bolt hidden in a backpack and that he needed to give it back to Zeus. The third line, refers that Percy’s friend, Luke; who happened to help him in the beginning of the story; will betray him showing that he was the real thief of the master bolt and tried to kill Percy at the end of the story. The fourth and final line, refers that Percy couldn’t save his mother from the underworld with Hades because he didn’t have enough pearls for everyone to leave.

what novel are you talking about?