Cirque du Freak , known as The Saga of Darren Shan in Japan, is a Japanese manga series illustrated by Takahiro Arai and based on the book series The Saga of Darren Shan by author Darren Shan. The series was published in Shogakukan's Weekly Shōnen Sunday from August 2006 to February 2009, with its chapters compiled in twelve tankōbon volumes.

Darren O'Shaughnessy is an Irish writer and novelist. He is best known for his young adult fiction series The Saga of Darren Shan, The Demonata, and Zom-B, published under the pseudonym Darren Shan. The former was adapted into a manga series from 2006 to 2009 as well as a live-action film in 2009, with a prequel series, The Saga of Larten Crepsley, being released from 2010 to 2012.