Percy Jackson: Sea of Monsters

Percy Jackson recounts the story of Thalia Grace and her sacrifice: pursued by monsters on their way to Camp Half-Blood, a young Thalia sacrificed herself to save her friends, Annabeth, Luke and Grover. Her father Zeus turns her into a tree which forms a protective barrier around the camp. In the present day, Percy's quest for Zeus's bolt has faded in popularity and he is called a one-quest wonder by camp bully Clarisse La Rue, but is still supported by Annabeth and Grover. He is joined at camp by a young cyclops named Tyson, revealed as a son of Poseidon, and therefore his brother.