George Iii, D: Star Trek The Original Series: Allegiance in Exile

Captain James T. Kirk embarks on a mission that he may soon regret in this Star Trek: The Original Series adventure from the New York Times bestselling author.
A beautiful green world, rich in fertile soil and temperate climate—a textbook Class-M planet that should be teeming with life. Scans show no life-signs, but there are refined metals, including those associated with a space-faring race, and a lone city. But where are all of the inhabitants? Captain James T. Kirk leads a landing party from the USS Enterprise, hoping to get some answers.
The away team discovers a city in ruins, covered by dust, utterly bereft of life. Tricorder readings indicate that this is no ancient metropolis—it has been deserted only for a year. And just beyond the citadel lies what appears to be an ancient spaceport...a graveyard of ships that have clearly been sabotaged.
With these ruins too far from either the Klingon or the Romulan Empires, the Enterprise crew can only wonder: Who could have done this? And could this unnamed threat now pose an imminent danger to the Federation?