Re: Existing sci-fi stories adapted into Star Trek?
Marvel Comics did an issue on that subject in 1980 (a story which was actually a bit similar to ENT's "Daedalus," in that it involved "ghosts" that were incorporeal victims of early, failed transporter experiments).
I'll have to look up these stories—the "ghosts" aspect sounds a bit like Robert Sheckley's IMMORTALITY, INC.
"No, I better not look. I just might be in there."
—Foghorn Leghorn, Little Boy Boo