The Saga of Darren Shan (known in the U.S. as Cirque Du Freak) is a series of young adult vampire novels written by Darren O'Shaughnessy. Through out the series, the life of Darren Shan is narrated, following his ordeal with being turned into a half-vampire (blooded) by another vampire, Larten Crepsley. The Saga has also been published into four trilogies books, which the film, Cirque Du Freak: The Vampire's Assistant, is based upon.