I'm becoming increasingly convinced that the Romulan Empire does not represent a credible threat to the Federation. This is the second book which indicates that they are resource-poor and economically backward. In the last installment (Book #10), nearly 1/3 of the population of the Empire had died from Space COVID, and in this one, at least 15 Romulan Ships are destroyed, as they are otherwise incapable of taking on 2 Constitution-class Cruisers, not to mention a reference to their scientific technology being significantly behind that of the Federation. It's a wonder that they haven't been conquered by Risa at this point. It would be like the United States being directly threatened by, oh let's say, North Korea, or maybe Iran, Iraq, Afghanistan...oh, wait...maybe they are actually dangerous...lol
At any rate, Spock apparently had a kid with Zarabeth in the TOS episode "All Our Yesterdays" and learns about it from a 5,000-year old cave painting, which causes him to use the Guardian of Forever to retrieve his child, and hilarious hijinks ensure...actually, it's more Spock being an absolute asshole to his child for some reason, and then his child eventually deciding that he doesn't belong in the modern time and returning to Sarpeidon 5,000 years ago, via the Guardian, and becoming a leader who ushers in civilization to the planet, all the while, the Romulans are yet again invading Federation space, this time to find out why the system named "Gateway" is of such importance to the Federation (spoiler: they don't).
Totally pass-up-able.