The Empyrean Series, 3 Books Collection Set, Fourth Wing, Iron Flame, Onyx Storm, by Rebecca Yarros
| Country | USA |
| Brand | W. W. Norton & Company |
| Manufacturer | W. W. Norton & Company |
| Binding | Paperback |
| ItemPartNumber | 0393312445 |
| ReleaseDate | 1994-10-17 |
| UnitCount | 1 |
| EANs | 9780393312447 |