The Galactic Riddle Clark Darlton The Galactic Riddle Clark Darlton · 1975 First published 36 years earlier Save Continue from here
The Rebels of Tuglan Clark Darlton The Rebels of Tuglan Clark Darlton · 1972 First published 39 years earlier Save Continue from here
Beware The Microbots Kurt Mahr Beware The Microbots Kurt Mahr · 1973 First published 38 years earlier Save Continue from here
Ghosts of Gol Kurt Mahr Ghosts of Gol Kurt Mahr · 1976 First published 35 years earlier Save Continue from here
Secret Barrier X W.W. Shols Secret Barrier X W.W. Shols · 1972 First published 39 years earlier Save Continue from here
Escape to Venus Clark Darlton Escape to Venus Clark Darlton · 1976 First published 35 years earlier Save Continue from here
Invasion from Space Clark Darlton Invasion from Space Clark Darlton, Kurt Mahr · 1974 First published 37 years earlier Save Continue from here
