I understand why so many reviewers have decided to give this book a five star review, and I mostly agree that it deserves it. However, there is one small issue I have with this book, but before I speak to that issue let me give a short synopsis of what you'll find within it and what I liked about it.
Diplomatic Implausibility is the story of Worf and his new position as an ambassador for the Federation. On a distant planet, a planet held by the Klingons, a race of citizens attempt to rebuff the rule of the Klingons. Taking the tactic of terrorism to shrug off their oppressors, the planets inhabitants face being wiped out by the Klingons if a resolution can not be reached. In comes Worf.
Escorting Worf to the planet in question is a new ship and a new crew. This ship is a Klingon vessel and not one of those aboard are particularly pleased that Worf, a Federation lapdog, is in charge of the mission. As the story continues Worf must face trouble on many fronts, and must find a way to both end the conflict on the planet and to end the ill advised treatment given to him by the ships crew.
Although the main character of this book is Worf it should also be said that this book treats all characters evenly, giving each their own stage to stand on. For me, however, this book has very little to do with actual diplomacy like the title would suggest. Rather, the book focuses much of its time on the Klingon crew and their interaction with each other. This isn't a bad thing, but the diplomatic aspects of the book left me wanting. And at only 240 pages, this book could have included much more political drama or story dealing with the rebels and their struggle.
This was a great read and one I will probably read again in the future, however, you should know that what you read on the cover is not really what you'll read on the pages.