Star Trek Classics Volume 5: Who Killed Captain Kirk? — Peter David

Someone aboard the starship Enterprise has killed Captain Kirk–or so it seems. While the captain recovers, it falls to his crew to uncover the facts behind the case and learn whether one of their own is a cold-blooded killer. Add in the unwanted arrival of the Klingons and Kirk's nemesis from his academy days, Finnegan, to take charge of the investigation for an action packed adventure.