Percy Jackson--The Blazing Trident

Okay, so Percy's fought a war god, returned a lightning bolt to Zeus, gotten a Cyclops half-brother, retrieved the Golden Fleece, saved Thalia's dying tree and reverted her to human, saved two Hades's kids, defeated Kronos, found Pan, and destroyed the Titan's and their army, etc. Whew, he totally should have the peace he deserves now, right?

Fat chance. With ancient forces stirring up in the ocean, things are going to change. Another Prophecy strikes blows to his ears. The world will soon be plunged into darkness, and monsters overrun the earth. The Mist is failing and mortals begin to see what should remain unseen.

The culprit? That remains unknown. But Percy can hear this soft, twisting melody, sweet and dark music that wraps him in doom. And the sea turns blood-red as the Trident of Poseidon flickers with fire that can't be extinguished.