Maybe C.S. Lewis' space trilogy? Out of the Silent Planet (1938), Perelandra (1943), and That Hideous Strength (1945).
Or you could read (listen to) some more Phillip K. Dick, like A Scanner Darkly, or Ubik.
For books that have been made into movies that as audio books are very reminiscent of the movie versions, you could try No Country for Old Men, or The Road, the latter is a bit dark though.
I'll look up more PKD, I think his writing is fantastic. He adds a lot of color to his pages.
A Scanner Darkly as a book is fairly similar to the movie, though I may be biased by having seen the move first. Ubik is pretty weird.
Excellent book
THESE BOOKS ARE SO FIRE C.S. Lewis' space trilogy is so slept on
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