Sometimes it is difficult to believe that all of these stories were written in 1952-1955. Philip K. Dick was truly a visionary, often decades ahead of his time.
Second Variety is one of Dick's best short stories. Read that at least.
Read for the story Second Variety. The short story is where Dick really excels.
Without Dick the world would not be as we know it. Unsung in his own time, in debt and assisted by his belief in angels Dick wrought a dystopian canon that blasted a hole in the tired maxims of science fiction.