| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1986 |
|
O Inimigo está entre nós | Record | Novel | |
| April 1986 |
|
The Enemy Within | Bridge Publications | Novel | |
| January 1987 |
|
The Enemy Within | New Era Publications | Novel | |
| November 1988 |
|
The Enemy Within | Bridge Publications | Novel | 1 |
| April 1989 |
|
The Enemy Within | New Era Publications | Novel | |
| September 1991 |
|
L'ennemi intérieur | Presses Pocket | Novel | |
| June 1995 |
|
L'ennemi intérieur | Presses Pocket | Novel | |
| February 2004 | The Enemy Within | Bridge Publications | Novel | ||
| February 2006 | The Enemy Within | Galaxy Press | Novel | ||
| February 2012 |
|
Mission Earth Volumes 3 & 4: The Enemy Within & An Alien Affair | Galaxy Press | Omnibus | |
| February 2013 |
|
The Enemy Within | ReadHowYouWant | Novel | |
| March 2013 |
|
The Enemy Within | Galaxy Press | Novel |