Extensively rewritten and expanded version of "The Shadow Men" (1950).
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| October 1953 |
|
The Universe Maker / The World of Null-A | Ace Books | Omnibus | 5 |
| March 1957 |
|
Die Schatten | Pabel | Novel | 5 |
| July 1958 |
|
Urania #181 | Mondadori | MAGAZINE | 3 |
| 1959 |
|
Créateur d'univers | Éditions Scientifiques et Littéraires | Novel | 5 |
| 1959 |
|
Créateur d'univers | Éditions Scientifiques et Littéraires | Novel | 3 |
| January 1965 |
|
Die Schatten | Moewig | Novel | 5 |
| 1967 |
|
The Universe Maker | Ace Books | Novel | 5 |
| November 1969 |
|
Urania #528 | Mondadori | MAGAZINE | |
| January 1973 |
|
Ik ben uw schepper | De Vrijbuiter / De Schorpioen | Novel | 4 |
| 1974 |
|
Créateur d'univers | J'ai Lu | Novel | |
| March 1974 |
|
The Universe Maker | Ace Books | Novel | 5 |
| 1976 |
|
The Universe Maker | Ace Books | Novel | 5 |
| January 1976 |
|
Créateur d'univers | J'ai Lu | Novel | |
| March 1976 |
|
De heelalmaker | Meulenhoff | Omnibus | 5 |
| August 1976 |
|
The Universe Maker and The Proxy Intelligence | Sidgwick & Jackson | Omnibus | 1 |
| August 1977 |
|
The Universe Maker | Sphere Books | Collection | 5 |
| September 1977 |
|
Der Zeitspieler | Pabel | Novel | |
| August 1978 |
|
Science Fiction Special (27) | Sidgwick & Jackson | Omnibus | |
| November 1979 |
|
Destinazione Universo | Editrice Nord | Collection | 173 |
| December 1979 |
|
The Universe Maker | Pocket Books | Novel | |
| December 1979 |
|
The Universe Maker | Pocket Books | Novel | 5 |
| 1981 |
|
The Universe Maker | Sphere Books | Collection | 5 |
| July 1982 |
|
De heelalmaker / De reis van de Space Beagle | Meulenhoff | Omnibus | 5 |
| November 1982 |
|
The Universe Maker | Timescape / Pocket Books | Novel | 5 |
| 1984 | The Universe Maker | Sphere | Collection | 5 | |
| April 1984 |
|
Créateur d'univers | J'ai Lu | Novel | |
| April 1990 |
|
Gli uomini ombra | Fanucci Editore | Novel | |
| March 1991 |
|
Créateur d'univers | J'ai Lu | Novel | |
| March 1992 |
|
Anticipația CPSF 485 | Știință & Tehnică | MAGAZINE | 11 |
| April 1992 |
|
The Universe Maker | Carroll & Graf | Novel | |
| April 1992 |
|
Anticipația CPSF 486 | Știință & Tehnică | MAGAZINE | 10 |
| May 1992 |
|
Anticipația CPSF 487 | Știință & Tehnică | MAGAZINE | 19 |
| June 1992 |
|
Anticipația CPSF 488 | Știință & Tehnică | MAGAZINE | 16 |
| 1994 | O Universo de Morton | Livros do Brasil | Novel | ||
| March 1996 |
|
Créateur d'univers | J'ai Lu | Novel | |
| 2000 |
|
Universul umbrelor | Lucman | Novel | |
| May 2014 |
|
The Universe Maker | Agency Editions | Novel |