When seventeen-year-old Bella leaves Phoenix to live with her father in Forks, Washington, she meets an exquisitely handsome boy at school for whom she feels an overwhelming attraction and who she comes to realize is not wholly human.

Just after finding Bianca and Nico, two newly discovered half-bloods, Percy, Grover, Annabeth, and Thalia end up trapped between a helicopter and a manticore. Artemis and her Hunters save the day, but Annabeth disappears over a cliff; then Artemis rushes off to hunt a dangerous monster. Back at Camp Half-Blood, the Oracle foretells that Artemis must be rescued and makes a prediction that bodes ill for one of their number?but which one? Percy, who...