If you could see any star trek novel turned into an episode what would it be and why?

That's easy! "Ghost Walker" by Barbara Hably. Published in 1991, it relates the story of TOS Enterprise being highjacked by an alien hostile. Without giving too much away, get this: Spock, McCoy, Uhura, Nurse Chapel and Kirk's love latest love interest must conduct a SEANCE to speak to a disembodied Kirk roaming the Enterprise! Crazy huh? You gotta read this novel!

vulcan glory and sarek, because they both give you background information on spock's life.

I just read a few weeks ago the novel "Pathways" with the VOYAGER crew. This one would make a great episode. We learn alot of the background on the main characters and what makes them who they are.