About half of his work falls into two series: the "Bossy" series, about a computer with artificial intelligence, was written either alone or in collaboration with
Alex Apostolides or
Frank Riley; and the "Ralph Kennedy" series, which is more comical, and was written mostly solo, including the novel
When They Come From Space, although there was one collaboration with Apostolides. Clifton gained his greatest success with his novel ''
They'd Rather Be Right (also known as The Forever Machine
), co-written with Riley, which was serialized in Astounding'' during 1954, and which was awarded the
Hugo Award. =="Star, Bright"==