^You mention in your review how little was added to the adaptations. The first few Blish volumes took a lot more liberties with the stories, adding some interesting new ideas; for instance, it was in Blish's "Tomorrow is Yesterday" adaptation in Star Trek 2
that 40 Eridani was first proposed as Vulcan's home star. But the later adaptations became much more screen-accurate, largely due to complaints from the fans (yes, Trekkies have always been complaining about continuity). Also, I gather the later volumes were largely ghostwritten by Blish's wife J.A. Lawrence, though I'm not sure how extensive that was or when it began, if it's even so.