- Author: O'Brien Author Record # 77057
- Language: English
- Additional Bibliographic Comments: Author:O'Brien
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- A Sombra do Campanário [Portuguese] (1975)
- Agent of Chaos (1970)
- Azarius (1989)
- Dark Fortune (1993)
- Doom of Three Planets (1978)
- From the Land of Fear (1973)
- Het Slavenschip van Sergan [Dutch] (1975)
- Lazareth 3 [Dutch] (1977)
- Sogol [Dutch] (1977)
- Swamp Master (1992)
- The Animal People (1967)
- The Eighty-Minute Hour: A Space Opera (1975)
- The Moon People (1970)
- The New Tomorrows (1973)
- The Warriors of Terra (1970)
- To the Seventh Power (1990)
- Wizard of Storms (1973)
