I find myself drawn to some of the lesser-chronicled corners of the Star Trek franchise, including the Captain Sulu/Excelsior adventures, so I had high hopes for this book. Early on, it looked like it was going to deliver.
Essentially, this novel is set around the time of the films Star Trek VI: The Undiscovered Country and Star Trek: Generations and constitutes a prequel to the Star Trek: Deep Space Nine episode "Blood Oath". What was so impressive to me about the book is Martin's obvious deep knowledge and deep love of the Star Trek universe. The book is just teeming with obscure references that demonstrate a familiarity with not just the television and film "alpha canon" but the novel "beta canon" stretching back into the early 1980s. There's even a character named as a joke for people who know how to pronounce the standard Latin-alphabet transliteration of the Klingon language. It's that kind of book.
It's kind of a geek wonderland, and somehow never felt to me that it was going too far with the references and easter eggs.
At the same time, Martin has crafted a decent adventure yarn here too, with Sulu and the three most famous Klingon captains from the Original Series pitted against a Klingon bio-terrorist. There's plenty or action and the pace of the novel is consistent motion.
However, for all this, it's not much of a science-fiction novel and not much of a Star Trek novel either. Yes, it's fun to see significant life events of beloved characters depicted in detail for the first time. But stripped of its (many, varied) direct Star Trek references, there's nothing recognisably Star Trek about this book. Ultimately, I found that unsatisfying. Terrorism is a topical subject. The desire for, indugence of, or abstinence from vengeance is perennially human euestion. It's not like Martin's story didn't already contain the parameters to explore something thoughtful; it's just that he ignored all that.
Disappointing, but I still liked it because even if I felt it was a weak story, I felt a kindred spirit was telling it to me.