| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| In Search of Trash Island | Roger M. Wilcox |
1981 | English | Solution, Map |
| In the Universe Beyond | Roger M. Wilcox |
1981 | English | Solution, Map |
| India Palace | Roger M. Wilcox |
1980 | English | Solution, Map |
| Interstellar War | Roger M. Wilcox |
1981 | English | Solution, Map |