| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| December 1973 |
|
Swordships of Scorpio | DAW Books | Novel | 11 |
| December 1973 |
|
Swordships of Scorpio | DAW Books / New American Library of Canada | Novel | 11 |
| May 1975 |
|
Swordships of Scorpio | Orbit Book / Futura Publications | Novel | 11 |
| December 2005 |
|
Swordships of Scorpio | Mushroom eBooks | Novel | |
| 2007 |
|
The Delian Cycle | Bladud Books | Omnibus | 387 |
| April 2007 |
|
The Delian Cycle | Bladud Books | Omnibus | 392 |
| August 2009 |
|
The Delian Cycle | Mushroom eBooks | Omnibus | 392 |
| August 2009 |
|
The Delian Cycle | Mushroom eBooks | Omnibus | |4 |