Based on the earlier magazine story The Star Watchers (1951)
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| November 1951 |
|
Startling Stories, November 1951 | Better Publications, Inc.; Kokomo, IN | MAGAZINE | 10 |
| 1953 |
|
Sentinels from Space | Bouregy & Curl | Novel | |
| 1954 |
|
Rymdens väktare | Söderström | Novel | |
| 1954 | Sentinels from Space | Museum Press | Novel | ||
| 1954 |
|
Rymdens väktare | Tomas Förlag | Novel | |
| March 1954 |
|
Sentinels from Space / The Ultimate Invader and Other Science-Fiction: Stories from the Four Corners of Time | Ace Books | Omnibus | 5|1 |
| July 1954 |
|
I Romanzi di Urania #51 | Mondadori | MAGAZINE | 3 |
| 1955 |
|
Sentinelas do universo | Livros do Brasil | Novel | |
| September 1957 |
|
Agenten der Venus | Pabel | Novel | 3 |
| March 1958 |
|
Satellite [France], #3 | Éditions Satellite | MAGAZINE | 2 |
| April 1958 |
|
Satellite [France], #4 | Éditions Satellite | MAGAZINE | 2 |
| May 1958 |
|
Satellite [France], #5 | Éditions Satellite | MAGAZINE | 2 |
| 1960 |
|
Sentinels from Space | Ace Books | Novel | |
| September 1967 |
|
Urania #470 | Mondadori | MAGAZINE | 3 |
| March 1970 |
|
Agenten der Venus | Heyne | Novel | 5 |
| July 1974 |
|
La sentinelle de l'espace | Librairie des Champs-Élysées | Novel | |
| January 1975 |
|
La sentinelle de l'espace | Librairie des Champs-Élysées | Novel | |
| September 1976 |
|
Sentinels from Space | Ace Books | Novel | 1 |
| November 1978 |
|
Millemondinverno 1978: 2 romanzi e 7 racconti di Eric Frank Russell | Mondadori | Omnibus | 5 |
| 1980 |
|
Sentinelle de l'espace | Librairie des Champs-Élysées | Novel | |
| June 1986 |
|
Sentinels from Space | Del Rey / Ballantine | Novel | 1 |
| November 1987 |
|
Sentinels from Space | Methuen | Novel | 1 |
| September 2001 |
|
Entities: The Selected Novels of Eric Frank Russell | NESFA Press | Omnibus | 137 |