This novel was expanded from the novella with the same name, from Unknown December 1940.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1948 |
|
Darker Than You Think | Fantasy Press | Novel | 1 |
| 1948 |
|
Darker Than You Think | Fantasy Press | Novel | 1 |
| November 1952 |
|
I Romanzi di Urania #4 | Mondadori | MAGAZINE | 3 |
| February 1961 |
|
Plus noir que vous ne pensez | Hachette | Novel | |
| 1963 |
|
Darker Than You Think | Lancer Books | Novel | |
| July 1964 |
|
Urania #342 | Mondadori | MAGAZINE | 3 |
| August 1967 |
|
Die Herrscher der Nacht | Moewig | Novel | 5 |
| October 1969 |
|
Darker Than You Think | Berkley Medallion | Novel | 9 |
| 1970 |
|
Plus noir que vous ne pensez | Éditions Rencontre | Novel | 13 |
| January 1972 |
|
Il figlio della notte | Libra Editrice | Novel | |
| July 1972 |
|
Plus noir que vous ne pensez | Denoël | Novel | |
| 1974 |
|
Zwarter dan u denkt | Bruna | Novel | |
| October 1975 | Darker Than You Think | Garland Publishing | Novel | ||
| August 1976 |
|
Il figlio della notte | Mondadori | Novel | |
| November 1976 |
|
Darker Than You Think | Sphere Books | Novel | 7 |
| January 1978 |
|
Plus noir que vous ne pensez | Presses Pocket | Novel | 5 |
| 1979 | Geschöpfe der Finsternis | Ullstein | Novel | ||
| July 1979 |
|
Darker Than You Think | Dell | Novel | |
| February 1983 |
|
Il figlio della notte | Mondadori | Novel | |
| August 1984 |
|
Darker Than You Think | Bluejay Books | Novel | |
| March 1988 |
|
Plus noir que vous ne pensez | Presses Pocket | Novel | |
| November 1989 |
|
Darker Than You Think | Collier Books | Novel | 1 |
| September 1994 |
|
Storie di lupi mannari | Newton Compton | Anthology | 902 |
| 1998 | Darker Than You Think | The Easton Press | Novel | ||
| December 1999 |
|
Darker Than You Think | Orb | Novel | |
| December 1999 |
|
Darker Than You Think | Orb | Novel | |
| March 2000 |
|
Al posto dell'umanitĂ | Mondadori | Anthology | 11 |
| June 2000 |
|
Darker Than You Think | Orb / SFBC | Novel | |
| August 2003 |
|
Darker Than You Think | Gollancz / Orion | Novel | |
| January 2007 |
|
Il figlio della notte | Mondadori | Novel | 7 |
| August 2008 |
|
Darker Than You Think | Gollancz | Novel | |
| 2009 |
|
Mai întunecat decât crezi | Editura Leda | Novel | |
| April 2011 |
|
Darker Than You Think | Spectrum Literary Agency | Novel | |
| June 2012 |
|
Darker Than You Think | Blackstone Audio | Novel | |
| June 2013 |
|
Darker Than You Think | Gateway / Orion | Novel | |
| March 2022 |
|
Il figlio della notte | Fanucci Editore | Novel | |2 |
| April 2022 |
|
Il figlio della notte | Fanucci Editore | Novel | |2 |
| June 2024 |
|
Humanoids Series & More | Omnibus | |9 |