First off I want to say....damn I love that cover. It comes from a earlier time. If you look at Sci-Fi art from the 70's and into the 80's you can find a lot of these sorts of style. I have always loved that style.
Doing novels based on series is hard. As is a Role Playing Game. Its always a worry if your getting it right. Is the book or game Trek enough. In both instances I suspect everyone just does their best and see's what they can come up with.
I found this gem at a second hand book store. 1976 in the front cover. It features 8 short stories. I must admit I like the short story format. If I don't like the story the next one is not far off.
Does it feel Trek? Overall...yes but its certainly a sliding scale. Certainly some good ideas and as a place on my bookshelf its a pretty cool. If you can find a copy it is worth picking up.