| All Series | No on Sale Date | On Sale Date |
| Open Space | |||||
| number | publicationdate | sortcode | onsaledate | genre | |
| 1 | Mid-December 1989 | 78802 | 1989-10-03 | science fiction | Original work |
| 2 | April 1990 | 78803 | 1990-02-06 | science fiction | Original work |
| 3 | June 1990 | 78804 | 1990-04-03 | science fiction | Original work |
| 4 | August 1990 | 78805 | 1990-06-05 | science fiction | Original work |