Damon Francis Knight was an American science fiction author, editor, and critic. Knight's first professional sale was a cartoon drawing to a science-fiction magazine, Amazing Stories. His first story, "Resilience", was published in 1941. He is best known as the author of "To Serve Man", which was adapted for The Twilight Zone. He was a recipient of the Hugo Award, founder of the Science Fiction and Fantasy Writers of America (SFWA), cofounder of the National Fantasy Fan Federation, cofounder of the Milford Writer's Workshop, and cofounder of the Clarion Writers Workshop. Knight lived in Eugene, Oregon, with his wife Kate Wilhelm.
After twenty previous volumes that appeared over almost fifteen years, Damon Knight's series of original short speculative fiction anthologies came to an end with Orbit 21. There's an interesting essay by Knight to introduce the book that gives some interesting details of the history of the series. It's neither a bad nor particularly auspicious end to the series. I missed having a final Kate Wilhelm story (as well as a Paul Lehr cover), and found most of the stories just okay, but not particularly memorable. I liked the ones by Gordon Eklund, Carol Emshwiller, and Kim Stanley Robinson.