It's a blog! Mainly of book reviews.
I think this must have been the last book Blish published in his life-time. It says that Star Treks 1-10 total 6.5 million books printed which is interesting in that over 40 years later it's not these that are still in print, but rather a half dozen or so very influential SF novels straight from his own imagination that show a fascination with Catholic theology, James Joyce and shock endings, among other things.
It feels like the later members of this series of adaptations of the original Star Trek shooting scripts suffered from being essentially the dregs; the best had all been used earlier. Here several of the stories make no sense at all and one of them ends with a hideous cop-out deus ex machina - but blame the script writers, not Blish!