Percy Jackson: The Demigod Files is an accompaniment to the mythological fantasy pentalogy, Percy Jackson And The Olympians. The Demigod Files contains three stories, several interviews with the campers, a map of Camp Half-Blood, a picture of Annabeth’s trunk, and an assortment of activities and crossword puzzles. The three stories contained in the book are Percy Jackson And The Stolen Chariot, Percy Jackson And The Bronze Dragon, and Percy Jackson And The Sword of Hades. Percy Jackson: The Demigod Files (Film Tie-In) (Percy Jackson And The Olympians) also contains a glimpse of The Last Olympian.
In Percy Jackson And The Stolen Chariot, Clarisse La Rue confides in Percy Jackson that, as part of a ritual for the children of Ares, she must return Ares’ war chariot to the Intrepid, his temple. But, Phobos and Deimos, her immortal brothers who are the actual guardians of the chariot, become jealous and steal it from her. Percy offers his help in recovering the chariot.
Percy Jackson And The Bronze Dragon sees Percy and Charles Beckendorf as teammates for the game Capture The Flag. When Beckendorf is captured by Myrmekes, Percy must find a way to save him. He is also in a quandary about asking Annabeth to the fourth of July fireworks.
In Percy Jackson And The Sword Of Hades, Percy, Nico, and Thalia are tasked by Persephone to go down to the underworld and recover the sword of Hades. The sword is stolen by a demigod spy. The trio are in a race against time to track down the spy, before he escapes to the underworld with the sword.
The film tie-in edition of Percy Jackson: The Demigod Files (Film Tie-In) (Percy Jackson And The Olympians) was published by Penguin UK in 2011, and is available in paperback.