David Gerrold is the author of the Hugo and Nebula Award–nominated The Man Who Folded Himself, the Star Wolf, Dingillian, and Chtorr series, and When Harlie Was One. He also wrote "The Trouble with Tribbles" episode of Star Trek, voted the most popular Star Trek episode of all time. He lives in Northridge, California. Mike Resnick is the author of more than 40 science fiction novels, 12 collections, 150 short stories, and two screenplays, and he has won four Hugo Awards and the Nebula Award. He lives in Cincinnati, Ohio.