Asahi Sonorama
All of the official publications in the series were originally published by Asahi Sonorama under the Sonorama Bunko label. Additionally, from November 1992 through February 1993, special hardcover editions of the first seven volumes, plus "Dark Nocturne", were published by Asashi Sonorama to commemorate the series' 10th anniversary, as the ; each included a new cover illustration and a color interior illustration by Yoshitaka Amano.