conceived by J.J. Abrams ; written by Doug Dorst. A young woman picks up a book left behind by a stranger. Inside it are his margin notes, which reveal a reader entranced by the story and by its mysterious author. She responds with notes of her own, leaving the book for the stranger, and so begins an unlikely conversation that plunges them both into the unknown.
When I was re-reading TLO i realized that Annabeth kept her word saying that she would stay and fight next to Percy. A promise 4 years old. When all the Apollo campers were retreating,she stayed behind and fought with Percy.