Here's a summary of the story:
Percy's world is turned upside down when he learns he's a demigod. He has always struggled in school, with a learning disability and being bullied. His life takes a dramatic turn when his pre-algebra teacher turns into a monster, his best friend disappears, and he's accused of stealing Zeus' lightning bolt, a powerful artifact that could start a war between the gods.
Percy is whisked away to Camp Half-Blood, a secret training camp for demigods. Here, he learns to control his powers and meets other demigods who have been raised in mortal environments. He learns about the ancient Greek gods and goddesses, and about his own heritage.
Percy, along with his friends Annabeth Chase (daughter of Athena, goddess of wisdom) and Grover Underwood (a satyr who is Percy's protector), must embark on a quest to clear Percy's name and find the stolen lightning bolt. This perilous journey takes them to the Underworld, where they face mythical creatures and dangerous challenges.
The book culminates in a confrontation with the true villain behind the theft. This leads to a battle that tests Percy's abilities and ultimately determines the fate of both the mortal and divine worlds.
Percy Jackson and The Lightning Thief is a story about self-discovery, friendship, and facing one's destiny. It's a thrilling adventure that blends Greek mythology with modern-day settings, creating a unique and engaging world for young readers.