En forvandling er nødvendig
| Publisher | Borgens Forlag |
| Publisher Series | Borgens Billigbøger |
| Editor | Mary Lutyens |
| Translated by | Erik Stinus |
| Author photo/portrait | Mark Edwards |
| Typeset by | Duplex-Trykkeriet |
| Printed by | Duplex-Trykkeriet |
| Format | Paperback |
| Language | Danish |
| Location | Denmark |
| Copyright | 1971 |
| First Printing in Country | 1971 |
| Pages / Font | 191 pages |
| ISBN | 87-418-3195-0 |
| Series Number | BB 109 |
Added by ziggiole · Last edited by Bacchanalia