Camp Half-Blood Chronicles is an American media franchise created by American author Rick Riordan, encompassing four book series, two short-story collections, two myth anthology books, a stand-alone short story, three crossover short stories, an essay collection, multiple guides, nine graphic novels, two films, a live action TV series, a video game, a musical, and other media. Set in the modern world, it focuses on groups of adolescent demigod heroes and features characters from Greco-Roman mythology.