Lightning Thief is a fantasy novel written by Rick Riordan. The book follows the story of Percy Jackson, a young boy who discovers that he is a demigod, the son of Poseidon. Throughout the series, Percy embarks on various adventures in the world of Greek mythology. The Lightning Thief received critical acclaim and became a bestseller, leading to the creation of a successful film adaptation. Victo Ngai is an illustrator who has contributed her stunning artwork to the book's cover.