Untouched by Human Hands Robert Sheckley Untouched by Human Hands Robert Sheckley · 1954 First published 21 years earlier Save Continue from here
The Black Cloud Fred Hoyle The Black Cloud Fred Hoyle · 1957 First published 18 years earlier Save Continue from here
The Sands of Mars Arthur C. Clarke The Sands of Mars Arthur C. Clarke · 1951 First published 24 years earlier Save Continue from here
