| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1994 | Flatland / Sphereland | Harper Perennial | Omnibus | vii|1 | |
| 1997 |
|
Flatland / Sphereland | Harper Perennial | Omnibus | vii|1 |
| 2001 |
|
Flatland / Sphereland | Quill / HarperCollins | Omnibus | |1 |