Fleet of Worlds: 200 Years Before the Discovery of the Ringworld (Known Space)
| Country | USA |
| Brand | Harpercollins |
| Manufacturer | HarperCollins |
| Binding | Paperback |
| ItemPartNumber | FBA-|281496 |
| ReleaseDate | 1978-10-25 |
| UnitCount | 1 |
| Format | Picture Book |
| EANs | 9780064440103 |