Really I want to give this book three and a half stars. This was a mostly good read but it did have some things holding it back.
The book's story is spread out over three time periods - 2024 (the present day at time of publication), 2268 (just after the events of the TOS episode "Day of the Dove") and 2292 (roughly a year before the events of Star Trek VI: The Undiscovered Country). The overall plot is complex, so I will describe it simply as a question: What does the disappearance of whale biologist Dr. Gillian Taylor from 1986 (see Star Trek IV: The Voyage Home) and, more specifically, a podcaster's investigation of that disappearance in 2024 have to do with a Federation scientist kidnapped to a pre-warp planet centuries later in 2268 AND a diplomatic mission in 2292 involving the Federation, the Klingons, the Romulans and a reclusive and ancient alien race? If you think this sounds complicated, you're right, it's quite the tangled web. If you think it sounds bonkers to tie it all in with a 2024 podcaster, you're also right, and yet it all works!
The chapters mostly alternate from one year to another, with the solution to the mystery of their connection playing out gradually, with clues dropped along the way. I don't want to say too much so as to not give away anything. However, I WILL say that the book keeps you wondering as more and more pieces of the puzzle keep coming in to play until, eventually, the picture starts to become clear. I will also say that while a 2024 investigation into a cold case of a missing person is interesting, it comes with a VERY unexpected twist, a twist so subtle you don't even see it playing out right away.
The 2268 chapters, admittedly, feel a bit by-the-numbers for Trek, full of things and tropes we've seen before. They're not bad, just not all that fresh, but still appealing, like comfort food. The 2292 chapters bring back the character of Saavik (last seen in Star Trek IV: The Voyage Home) and it's great to see her playing a major role in those chapters' events.
The real surprise however was the 2024 chapters, featuring mostly original characters and a few minor characters from The Voyage Home. The two co-protagonists of these chapters (the podcaster and her friend/roommate/tech guy) are delightful, and feel like people we know in the real world. Watching them follow the clues of a forty year old missing persons case (the author comes up with many logical questions and consequences that the movie raises but never had time to address) is actually the most exciting and fun part of the novel, and I was not expecting that at all. I thought the 2024 chapters would be on the boring side, but it actually outshines the telling of the events in the other two eras. That's highly unusual for Star Trek, not a storytelling approach often used (Star Trek: Voyager's "11:59" episode comes to mind), and seemingly even less likely to work so well, but Cox makes it work. One of the key twists of the plot in 2024 happens so suddenly it feels like the work of fellow Trek author Peter David, who was known for making the turn from zany humor to epic drama on a dime!
However, the book's main problem for me was this: the pacing. It comes in two forms:
1. One of the tendencies of many Trek authors over the years has been a tendency to slow down dialogue between characters with endless interruptions of narrative, narrative telling us things about the characters who are providing the dialogue, things we the readers, as Trek fans, already know - descriptions, attitudes, historical connections, sometimes at great length. Sometimes these are needed, but only sometimes, and only in very small amounts. Such narrative interruptions slow a scene down to a slog and ruin the flow of the scene. If exposition is needed, include it, but put it into the dialogue. If a character's private indecision or inner conflict is something we should know due to his relevance and importance to the story, then put it in, but sparingly. Not every Star Trek novel has to be written as if it is some random reader's first Star Trek experience - the odds are good that, because Trek is primarily a product of television, anyone picking up a Trek book to read has seen the show and knows the characters. Characterization via dialogue AND narrative is important for wholly original works, and for original characters being added to Trek for the first time in literary form, but we don't need much of it for the main TV characters unless it's VITAL for some reason to the book's specific events. This is a mistake that Greg Cox doesn't make a lot in this book, but it IS there and is noticeable enough to be annoying when it crops up.
2. The second flaw is more serious and it's one I've seen in other Trek books by this author. Cox has a tendency to stretch events out to the point where you want to find him and shake him and tell him to speed things up. This is especially the case when our heroes are dealing with stubborn, hostile characters who argue and argue and ARRRGUUUE, over and over again. We get it, they're hostile, they're unreasonable, but the more we're forced to read (or listen to, as I read this as an audiobook) such seemingly unending dialogue, the more impatient we get even with our heroes. This is, admittedly, kind of the OPPOSITE of the prior flaw talked about above. The prior flaw was too much unnecessary narrative interruption of dialogue, thus slowing down everything. But too much dialogue and not enough *progression* of the plot via that dialogue is just as bad, especially if the character are being annoying JUST to be annoying. The story needs to keep moving forward. If you need to demonstrate that someone is stubborn, okay, sure, do so, but do it with a light touch, even if you're building to a key point or clue - the author in such scenes is not building tension or suspense so much as dragging the tension or suspense out to an unpleasant degree. To be clear, this isn't impatience on the part of the reader because we know something the characters don't, but rather it's impatience with characters WHO WON'T SHUT UP AND YOU REALLY WISH THEY WOULD.
There is also one very minor quibble I have and that is a couple questions of continuity and science aren't really resolved or even addressed offhand - if the population of humpback whales made a comeback after 1986 (as they did in real life, and the book mentions their resurgence), why were they still extinct since the 21st century? How does Gillian (who does appear in the book) intend to save the humpbacks with only 3 of them (George, Gracie and their singular offspring) when modern genetics doesn't allow for that? I think there were a couple more questions I had that went unaddressed, but I cannot remember them now. (Note I say unaddressed, not unanswered - even if Cox has no good answer, at least hang a lampshade on it!)
So, I definitely recommend reading this book, but I recommend reading it in print where it's easier to gloss over or speed through the times it slows to a crawl (it's hard to fast forward an audiobook without knowing the time stamp of when something of critical importance needs to be heard, whereas the eye will have an easier time spotting the key moments to re-focus one's attention). The best Trek writers not only know the characters, their voices, and their lore (and Cox is GREAT at lore, no doubts there, it's one of his strengths!), but also know HOW to tell a story well in general, and that HAS to include knowing when to take it slow and when to pick up the pace.