Friedman has pulled together a really good story which not only focuses on the Star Trek universe, but has as it's main focus the ordinary people from that universe. The starship's crew is involved, but minimally, with only the first part of the book set in space, during the voyage to a planet where science experiments are underway. There, they are supposed to check on the scientists and then leave to deliver an ambassador to another planet.
Both missions are important, although the blustering ambassador feels his is more so. This of course raises hackles and possibly even causes the captain and crew to find excuses not to hasten. Finally though, after making sure to cover all the possible needs of the scientific group, and visiting with a former lover, Kirk takes his ship forward on it's ambassadorial visit, where of course there is a problem requiring the scientific skills of the crew.
Meanwhile, back on the first planet, the Klingons come visiting and wreck havoc and mayhem, chasing the missing people (children and Spock) while trying to find the device they know the people have hidden from them. Kirk and crew to a belated rescue (the children had already won the day) and peace and goodwill reign supreme - for the most part.
There were a couple of major quibbles I had with the storyline itself. First there was the population of the first planet. Although the author refers to them as colonists, they are not, they are scientists with a mission, that, as soon as it is completed, will move on. The definition of a colonist is someone who moves in with intent to stay.
Second, there was the background of the Klingon story, where the Emperor was sending out hit men. Yes, it's plausible, but the way it is accomplished makes the Emperor weak, and the Klingon mindset would not tolerate that.
Finally though there is the entire concept of Carol and David Marcus. Those familiar with the movies know the pair. However, this book was written nearly a decade after the movie release (1992 and 1984 respectively) and the author (or at least the publisher) should have taken better care with the backstory. There is a large part of Faces of Fire which deals with and reveals David's paternity, to pretty much everyone, but it was a long held secret in the movie franchise. The book does however make the father a little more savvy than the movie did!
There were also editorial glitches, missing words in sentences, misspellings and a few behavioral tics that felt out of place.
Overall though this is a very good read, and for those not fans of the original series and the movies, most of the concepts that I object to would not be obvious.