| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| December 1977 |
|
Secret Scorpio | DAW Books | Novel | 9 |
| December 1977 |
|
Secret Scorpio | DAW Books / New American Library of Canada | Novel | 9 |
| March 2007 |
|
Secret Scorpio | Mushroom eBooks | Novel | |
| March 2007 |
|
Secret Scorpio | Mushroom eBooks | Novel | |
| April 2009 |
|
The Vallian Cycle | Bladud Books | Omnibus | 3 |
| April 2009 |
|
The Vallian Cycle | Bladud Books | Omnibus | 3 |
| January 2011 |
|
The Vallian Cycle | Mushroom eBooks | Omnibus | |3 |