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| Other views: | Summary Awards Chronological |
Novels
- A harmadik iker [Hungarian] (1996)
- Amok, der Killer-Gorilla [German] (1977) with Bernard L. Ross
- Amok, Koning van Kongo [Dutch] (1977) with Bernard L. Ross
- Amok: King of Legend (1976)
- Amok: King of Legend (1976) with Bernard L. Ross
- Apocalypse sur Commande [French] (2000)
- Az Éden Kalapácsa [Hungarian] (1999)
- Capricorn One (1978)
- Capricorn One (1978) with Bernard L. Ross
- Code to Zero (2000)
- Der dritte Zwilling [German] (1997)
- Die Kinder von Eden [German] (1999)
- Doble Juego [Spanish] (2002)
- Eedenin vasara [Finnish] (1999)
- El Tercer Gemelo [Spanish] (1997)
- En la Boca del Dragon [Spanish] (2002)
- Il martello dell'Eden [Italian] (1998)
- Il terzo gemello [Italian] (1996)
- The Hammer of Eden (1998)
- The Third Twin (1996)
- The Power Twins and the Mystery Hideout (1992) [O]
- The Power Twins (1990)
- The Power Twins and the Worm Puzzle (1976)
- The Power Twins and the Worm Puzzle (1976) with Martin Martinsen
- Pillars of the Almighty (1994)
- Dead Alien (1977)
- Dead Alien (1977) with Martin Martinsen
- Mind Bend (1979)
- Mind Bend (1979) with Martin Martinsen
- Space Pirate (1977)
- Space Pirate (1977) with Martin Martinsen
- The Power Twins (1990)
- The Power Twins and the Worm Puzzle (1976)
- The Power Twins and the Worm Puzzle (1976) with Martin Martinsen
- Introduction (The Shining) (1991)