| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1983 |
|
Sphereland: A Fantasy About Curved Spaces and an Expanding Universe | Barnes & Noble Books | Novel | vii |
| April 1994 | Flatland / Sphereland | Harper Perennial | Omnibus | vii|3 | |
| 1997 |
|
Flatland / Sphereland | Harper Perennial | Omnibus | vii|3 |
| 2001 |
|
Flatland / Sphereland | Quill / HarperCollins | Omnibus | |3 |