The anime is based on each characters and stories in three parts for each books, including "Shards of the Oracle", "Reign of the Soul Eater" and "Quest of the Earthen". The first book was written by Ted Anasti and Patsy Cameron-Anasti. Stephen D. Sullivan joined them and helped write the second and third books in the series. The books were first published in December 2004. They were published by Newmarket Press.