Fleet of Worlds: 200 Years Before the Discovery of the Ringworld (Known Space)
| Country | USA |
| Brand | Mariner |
| Manufacturer | Mariner Books Classics |
| Binding | Paperback |
| ItemPartNumber | Illustrations, black and white |
| Color | Black |
| ReleaseDate | 1970-03-25 |
| UnitCount | 1 |
| EANs | 9780156260268 |