| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1974 |
|
Prince of Scorpio | DAW Books | Novel | 9 |
| April 1974 |
|
Prince of Scorpio | DAW Books / New American Library of Canada | Novel | 9 |
| December 2005 |
|
Prince of Scorpio | Mushroom eBooks | Novel | |
| 2007 |
|
The Delian Cycle | Bladud Books | Omnibus | 517 |
| April 2007 |
|
The Delian Cycle | Bladud Books | Omnibus | 519 |
| August 2009 |
|
The Delian Cycle | Mushroom eBooks | Omnibus | 519 |
| August 2009 |
|
The Delian Cycle | Mushroom eBooks | Omnibus | |5 |