The aftermath
Ben Bova
Moonrise
Moonwar
Orion in the dying time
Orion and the Conqueror
Orion Among the Stars
Voyagers III: Star Brothers
The Trikon Deception
Ben Bova & Bill Pogue
The Watchmen
Vengeance of Orion
The Precipice
The Exiles Trilogy
Mars
Venus
Forward in Time