Before diving into The Demigod Files, let's take a brief look at the Percy Jackson series. The series follows the adventures of Percy Jackson, a young boy who discovers he's the modern-day son of the Greek god Poseidon. Along with his friends Annabeth Chase (Athena's daughter) and Grover Underwood (a satyr), Percy embarks on quests to save the world from various monsters and villains from Greek mythology. The series consists of five books: