BiblioBazaar · University of Michigan Press
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| The Heavenly Twins | 978-0-472-06508-0 (0-472-06508-4) | 1993 |
| The Heavenly Twins, Volume 1 | 978-1-4264-3164-7 (1-4264-3164-3) | 2007 |
| The Heavenly Twins, Volume 2 | 978-1-4346-2009-5 (1-4346-2009-3) | 2007 |