The Penetrator
Titles (6)
| # | Title | Author(s) | Year | Type |
|---|---|---|---|---|
| 21 | The Supergun Mission | Mark K. Roberts | 1977 | |
| 33 | Satellite Slaughter | Mark K. Roberts | 1979 | |
| 35 | Black Massacre | Mark K. Roberts | 1980 | |
| 45 | Quaking Terror | Mark K. Roberts | 1982 | |
| 47 | Orphan Army | Mark K. Roberts | 1982 | |
| 49 | Satan's Swarm | Mark K. Roberts | 1983 |