I didn't understand what the purpose of this series was before. I believe I understand now after having read this one. Apparently this is going to be a series of semi-standalone books that each have self-contained stories. The formula is that Carl Butler, the protagonist, reluctantly takes on some mission that initially seems like it won't be all that much, then turns out to be of extreme importance. This time it's a young girl requesting Butler to find her father, a seemingly simple missing persons case, albeit an interplanetary one. Butler isn't a detective, he's ex-military, but that's what each book has increasingly been pushing him towards, much to his dismay.
The premise of this series was military SF investigations and while that may have been true for the first book, it's increasingly more investigations and less anything else. There's some combat in this one, though it feels more like it was included as part of a quota. It made everything read more like a procedural than the previous books, which may have been the intention. I don't personally mind, as much popular media does the same, but if you're looking for more than that, it isn't here. That's disappointing in that I know Mammay can be more ambitious, as with Generation Ship, though that isn't this.
Perhaps it's because I haven't read much in the way of thrillers that explains why I'm increasingly reminded of John Sanford's Davenport series, especially the latter books in the series. Incidentally there's a minor character in this book named Davenport. As with many books in the Davenport series, and a few other series I read, they aren't that enjoyable to read, but they fulfill a specific niche of enjoyment and that's enough for me to keep going. These books won't ever be something I think fondly of, it'd more be of a lukewarm remembrance, but even so I feel I'd be missing out on a bit if I haven't read them. There's a limit to how many series I can read that are like that, however I won't know what that limit is unless I've reached it. I won't worry about it until then.
The particular problem I have with this one is its intentional negation of its sense of wonder. By doing so it does make quite the point, though considering the disconnect between the books, I have to wonder whether it, or really anything that happens in the books, will have a consequences for the setting. Having a situation where you become involved in possibly the greatest discovery in human history and it's downplayed as merely a commercial venture is quite something. Considering how powerful corporations are in this setting it's not surprising. It's presented as being the realities of the situation. The nonchalance reminds of me Amy Griswold's "Still Tomorrow's Going to Be Another Working Day", which as you may infer from the title, no matter what happens, the grind continues, and maybe that's all there is.