Expansion of "Mercenary" (1962).
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1968 |
|
The Key to Venudine / Mercenary from Tomorrow | Ace Books | Omnibus | 5|4 |
| November 1975 |
|
The Five Way Secret Agent and Mercenary from Tomorrow | Ace Books | Omnibus | 5 |
| September 2011 |
|
Mercenary From Tomorrow | Gateway / Orion | Novel |