| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1968 |
|
The Key to Venudine / Mercenary from Tomorrow | Ace Books | Omnibus | 5|2 |
| December 2012 |
|
The Key to Venudine | Gateway / Orion | Novel | |
| December 2012 |
|
The Key to Venudine | Gateway / Orion | Novel |