Gregor the Overlander Collection: Books 1-5 (The Underland Chronicles)
| Country | USA |
| Brand | American Psychological Association |
| Manufacturer | American Psychological Association |
| Binding | Paperback |
| ItemPartNumber | 9781433816871 |
| UnitCount | 1 |
| EANs | 9781433816871 |
| ReleaseDate | 0000-00-00 |