CXan you tell us a bit about them, fbaezer?
is my favorite Philip K. Dick novel (didcha know lightwizard actually met PKD?) and I was terrified
while reading it... and thinking at the same time what a cool movie would it make.
There are the alive people and then there are the semi-alive, agonizing people, kept in special chambers where they can "wake up" for a while and relate to the living. But at some point (enough spoilers already) the characters don't know whether they're alive -and perceive external reality- or semi-alive -and perceive either their own constructed reality or some semi-alive neighbour's constructed reality.
Tipical PKD (Blade Runner, Total Recall, Minority Report) ontological problems. What makes us alive? What makes us who we are? Is this reality made up? Are we somebody else's dream? Are we the nightmare of a teenage God?
Asimov's The Naked Sun
is a Sci Fi classic I don't understand why it hasn't been filmed, since it would be so easy. A crime is committed in a faraway planet, and a detective from earth is sent there to solve it, with his android assistant. The faraway planet is affluent, scarsely populated and has a culture that is very much against human contact. So somehow it's a Third World agent trying to solve a First World crime... but first he has to understand how this "affluent world" works.