Second Contact by Mike Resnick has a fascinating premise: A space captain on trial for murdering his own crewmen because he believed they were aliens. After that’s set up, the rest of the novel reads more like a contemporary political thriller than science fiction, as Becker, the officer assigned to defend the Captain, runs into dead ends with disappearing witnesses. Pursuing every lead with the help of a computer whiz, Becker incurs the wrath of a conspiracy that seems to involve aliens, like something you’d see on the X-Files or The Invaders. The computer technology described probably seemed futuristic when this was written, but seems ordinary now, though the story is still set about 50 years in the future from now. The suspense kept the pages turning. In the end everything is explained and mostly wrapped up.