While there is a bit too much narration and exposition in the book, this was an enjoyable read. The regular Trek crew were all pretty wooden and rote in terms of characterization (especially Spock and McCoy) but the new character of Lt. Ansfield is a strong and unique one, and I hope to see her in other books. Older folks wanting adventure in the 23rd century is not something that has been adequately explored in the Trek Universe.
Also, be forewarned that this is a continuation of another novel subset (Chain of Attack), in which the concept of the Nexus and the gates were introduced. You don’t really need to read those, but I think if I had, perhaps the gravitas of the situation would’ve been a bit more telling.