Once again, the Starship Enterprise is on a diplomatic mission, carrying a delegation towards Ixtolde, a world about the join the Federation. But, when they run into a weird special anomaly, one filled with old and decaying spaceships, including the Starship McRaven, which Kirk didn't know was lost, it becomes necessary to get to the bottom of things. There's a strange mystery here, and Kirk is determined to get to the bottom of it. But, it might just cost him more than he ever expected.
This is a pretty good Star Trek: TOS book. The characters all act completely in characters, which is not something you can take for granted with some books! It also has a lot of good action and adventure.
On the other hand, the weaknesses of the book keep it from being any more than pretty good. The whole "ghosts" angle is pretty poorly handled, seeming rather unscientific. Also, while one mystery is solved, so many others are simply left hanging. And would the Federation indeed punish a people for crimes committed by their ancestors? It seems so unlikely.
So, yeah, while this book does have its good points, it also has its bad ones. It's a pretty good book, but far from a great one.