I generally love Philip K. Dick, though he's written a couple books I'd love to like, but just don't work for me (Man in the High Castle, VALIS). My favorites are Ubik and The Three Stigamata of Palmer Eldritch.
He had a talent for thoroughly dystopian stories, but with a flurry of cleverness and creativity, and in fact a lot of humor. (The bored martian colonists playing with Barbie dolls in Palmer Eldritch, for instance, simultaneously tragic, comic and with just a hint of cosmic horror.)
Flow My Tears doesn't disappoint:
There's something I think typically 1970s American in there; there's something fascinating in Nixon's depiction in American pop culture, both clownish and sinister.He trod across the wall-to-wall capret, which depicted in gold Richard M. Nixon's final ascent into heaven