The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a supplementary book to series Percy Jackson & the Olympians. It mainly contains three short stories, titled "Percy Jackson and the Stolen Chariot", "Percy Jackson and the Bronze Dragon", and "Percy Jackson and the Sword of Hades". It is set between the fourth and fifth novels, The Battle of the Labyrinth and The Last Olympian. Additional contents are a letter from the Camp Half-Blood scribe Rick Riordan, question-and-answer style "interviews" with some of the campers, and various activities such as a crossword puzzle, and a preview of The Last Olympian. Antonio Caparo created the character designs. Source: Wikipedia (en)