Zesde Vijfling
| Book | The Secret Adversary |
| Translated by | A.E.C. Vuerhard-Berkhout |
| Series | Tommy & Tuppence |
| Format | Hardback |
| Language | Dutch |
| Location | Luitingh Sijthoff |
| Pages / Font | 428 pages |
| ISBN | 90 245 1414 2 |
Added by keesie13 · Last edited by thethrowback