David Gerrold is the author of the Hugo and Nebula award–nominated The Man Who Folded Himself and When HARLIE Was One, books that quickly established him in the hard science fiction genre during the 1970s. He also wrote “The Trouble with Tribbles” episode of Star Trek, voted the most popular Star Trek episode, and is the author of the popular Star Wolf, Dingillian, and Chtorr series. He lives in Northridge, California.