| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| November 1974 |
|
The Pawns of Null-A | Sphere | Novel | |
| 1976 |
|
The Pawns of Null-A | Sphere Books | Novel | |
| August 1976 |
|
The Pawns of Null-A | Sphere | Novel | |
| 1980 |
|
The Pawns of Null-A | Sphere | Novel | |
| 1985 |
|
The Pawns of Null-A | Sphere | Novel | |
| June 1992 |
|
Ultraterranium | Paper Tiger / Dragon's World | Nonfiction | 92 |
| August 1994 |
|
BP | Paper Tiger / Dragon's World | Nonfiction | [18] |