Author · 77 titles
ColonyBook· 1978
Return to MarsBook· 1999
Empire BuildersBook· 1993
KinsmanBook· 1979
The AftermathBook· 2007
OrionBook· 1984
City of DarknessBook· 1976
Able oneBook· 2010
PeacekeepersBook· 1988
Star WatchmanBook· 1964
Mars, IncBook· 2013
Mars lifeBook· 2008