The Sea of Monsters

Percy Jackson went missing from Camp Half-Blood, the night after he was claimed by Poseidon.

He and Annabeth Chase never properly got to know each other, and to Annabeth, his name is merely a memory.

The story of the missing son of Poseidon, Perseus Jackson, has become nothing but a simple campfire legend for most of camp.

Four years later, Annabeth gets issued her first quest at the age of 16, to retrieve the Golden Fleece from Polyphemus' island to save the tree of Thalia Grace.

On her quest, she encounters some strange rodents at the island of Circe.