Heinlein's works are more prophetic than you may realize. Not just with Starship Troopers, but also Friday ... a book that follows a synthetic human about in a future hypersexualized society that can change genders at will living in a balkanized United States.

Job: A Comedy of Justice was interesting as well as Stranger in a Strange Land but that last one is just a retelling of the story of Jesus.

The Moon is a Harsh Mistress carries some interesting ideas about running a cell-based terrorist organization ... and The Cat That Walks Through Walls is just strange.