The Empyrean Series, 3 Books Collection Set, Fourth Wing, Iron Flame, Onyx Storm, by Rebecca Yarros
| Country | USA |
| Brand | Algonquin Books |
| Manufacturer | Algonquin Books |
| Binding | Paperback |
| ItemPartNumber | 1565129776 |
| ReleaseDate | 2010-01-05 |
| UnitCount | 1 |
| EANs | 9781565129771 |