Wish it were Netflix or HBO or even Showtime. Amazon has a history of giving showrunners much less creative freedom and I have less faith this will be a satisfying adaptation. :/
Read "A Scanner Darkly", if you haven't already. That's one of the supreme weird tales.
I loved the man in the high castle for many of the changes and the overall style - but it seems the writers got a bit lost trying to round off the open ended story and fill in some blanks. Small wonder, considering the book.
VALIS is on another level: PKD had a mental breakdown, thought a interstellar intelligent pink light told hime about his son's hernia, and wrote a book about the other things the light told him.