Was there a law that '70s Star Trek books had to be bad? Did The Great Bird make some dictum that would-be professional writers could keep his legacy alive but only if they wrote books that made no sense? On the plus side, it's short and very smooth to read: small words, large font, brief paragraphs, mostly dialogue. On the negative side, there's the premise, the plot, the dialogue, and the resolution.
We shouldn't judge too harshly, since ST fans and writers had mainly their memories to go by - no tapes, no discs, no streams, probably not many reruns if any, especially by '78, even with a motion picture in the works. And I'm all for quick, light books that are popcorn-equivalents in the banquet of literature, but this feels like you're eating stale popcorn out of habit, not because you're hungry or even want to eat popcorn.
Most of the conversations read like these characters all woke up with amnesia and found a large sign saying "you are coworkers." There's no real connection among anyone, even the Big 3. Yet again we have a story of Kirk falling instantly in love with a mysterious woman and allows her on the bridge, is fine with her slapping him in front of everyone, and ignores all sorts of protocols and everyone's fine with it. But McCoy is doing that, too, so who cares. And everyone is fine with Kirk taking the flagship to an off-limits planet for a gal no one knows. And an actual Admiral dumps his clearly Starfleet-wash-out of a son onto Kirk, as if that's how Starfleet works - just dump a disrespectful, slovenly, insolent kid who doesn't want to be there onto the most important ship in the fleet, making the most important captain in the fleet have to teach him manners and make him a man, like it's some mid-season episode of MacGyver or something.
We are supposed to believe a bunch of three-foot tall stereotypical devil-looking guys used to have a mighty space empire and travelled the stars and founded worlds and civilizations. Sure, Gordo. But they lost one battle against space amoebas, everything fell apart, and they're down to 100 or so. Right, Gordo. But they managed to build a machine that ... um ... links their minds or something, which turns others bonkers but is really powerful and stuff ... something ... it makes no sense. "Excellent - write us that book, Gordo!" (We kid because we love.)
Like that mid-season MacGyver episode, everything wraps up neatly, the heroic sacrifices are undercut by nonsensical medical pronouncements, the slacker saves the day one time and is magically promoted to king and learns the true meaning of manhood and Christmas, and the filial connections that purport to drive the plot are ignored at the end, and the ship sails on with a conflicting "it's worse than we thought but they'll all be dead in ten years anyway so who cares and also increase the quarantine around a planet I went to without any authority hope that's okay."
And the magician scene at the beginning has no real connection to the story after all. Enjoy!