Flow My Tears, the Policeman Said
by Philip K. Dick
As a film, I imagine this would be something like a gritty Twilight Zone episode. It'd also be missing all kinds of fascinating character rumination, which is far and away my favorite part of this book. Characters chew on lighthearted themes like fascism, love, fame, sentimentality, attachment, materialism, and surely others I've either forgotten or missed. I will most definitely read this one again.