| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Crystal & Gem | Library Binding | 978-0-7566-0663-3 (0-7566-0663-2) | 2004 | R Harding · R.F. Symes · R.R. Harding |
| Crystal & Gem | Hardcover | 978-0-7566-0664-0 (0-7566-0664-0) | 2004 | R Harding · R.F. Symes · R.R. Harding |