From the Hugo Award winning novelist and anthologist
The fate of the Earth Empire hung in the balance - and Security Commissioner Spangler knew it was up to him to find the monster, the Rithian Terror, as some called it. Seven Rithians had landed on Earth. Six had been disposed of. One was loose.
Surely, Spangler reasoned, the stereoptic fluoroscope would flush it out. 'That's one test the Rithian can't meet, no matter how good his human disguise may be.' Spangler explained to Pembun, the strange, little Colonial who had been sent to help find the monster.
But Pembun didn't agree. 'The trouble,' he said, 'is that the Rithi have no bones. Which would be indication enough under a fluoroscope, if it weren't for the fact that it can easily swallow a skeleton.'
Damon Francis Knight was born in Oregon in 1922. He is regarded as one of the most important figures in modern science fiction, having made significant contributions to the field as an author, editor and critic. Knight co-founded the Milford Writers' Conference, the influential Clarion Workshop and the Science Fiction Writers of America, serving as its first president from 1965-67. Around this time he also made his reputation as one of the field's foremost anthologists. Beginning with reprint collections, in 1966 he launched the influential Orbit series of original anthologies. Starting with Orbit 1, the series would continue for over a decade, concluding in 1980 with Orbit 21. Orbit was the longest running and most influential anthology series in SF up to that point, showcasing such important authors as Gene Wolfe, R.A. Lafferty and Knight's third wife, Kate Wilhelm. A master of short fiction, Damon Knight is best known in wider circles as the author of TO SERVE MANKIND, which was adapted for THE TWILIGHT ZONE and later spoofed in a Hallowe'en episode of THE SIMPSONS. He was granted the SFWA's GRAND MASTER AWARD in 1995, and in 2002, SFWA renamed it the DAMON KNIGHT GRAND MASTER AWARD in his honour. He died in 2002.
For more information see www.sf-encyclopedia.com/entry/knight_damon