Twelve-year-old Percy Jackson has bounced between boarding schools his whole life, dogged by ADHD, dyslexia, and a knack for trouble he cannot explain. When a museum field trip goes violently wrong, he learns the truth: he is a demigod, the son of the Greek sea god Poseidon, and the monsters of myth are very real. Whisked to Camp Half-Blood, a sanctuary for children of the gods on Long Island, he begins to understand a world hidden just behind the mortal one. But his arrival coincides with crisis. Zeus's master lightning bolt has been stolen, and the king of the gods blames Percy. With war among the Olympians looming, Percy is given ten days to find the real thief and return the bolt before the summer solstice. He sets out across the United States with two companions: Annabeth, a sharp daughter of Athena, and Grover, a satyr charged with his protection. Their road trip becomes a gauntlet of mythological dangers, leading at last to the Underworld and a confrontation that reveals a deeper conspiracy stirring beneath the squabbles of the gods. Narrated in Percy's wry, self-deprecating voice, the story blends fast adventure with a coming-of-age tale about belonging, absent fathers, and finding strength in the very traits that once made him an outsider.