Explores the worlds created in the first seven novels of the anime series, providing information about characters, plots, and countries along with an interview with one of the artists, a guide created by fans, and an illustration gallery.
- Genre: Juvenile Fiction
- Subgenre: Movie or Television Tie-In, Comics + Graphic Novels / Manga, Science Fiction + Fantasy + Magic
- Age: Teen
- Publisher: Del Rey
- Pages: 231
- Language: English
- Format: paperback
- Release Date: December 12, 2006
- Date Published: December 12, 2006
- Author: William Flanagan, Clamp