Those are pretty solidly Gnostic themes, if I'm not mistaken?
Re:Four Kinds of Dystopia
by lobster_johnson on Saturday February 11, 2017 @07:40PM
(#13625835)
PKD loved Gnosticism, and many of his books feature variations on Gnostic mythology and metaphysics, even going back to earlier works such as Three Stigmata and UBIK, both of which put forth "false creator" mythologies.
My favourite underrated PKD novel is Galactic Pot-Healer, which is a really fun read. This time the false creator is Glimmung, a large whale-like creature that claims to have godlike powers, and which is attempting to remotely contact a number of artisans across the galaxy that it needs to rebuild its physical presence on a far-away planet. The mythos is weirder and a bit less darkly dystopian this time, and the whole thing is crazy from beginning to end. Highly recommended.
The books are about how a mad God is the creator of our universe and the real God has tried to force itself into our reality throughout history (Jesus, Buddha, etc), usually within the context of an oppressive government.
This is probably clearest in the second Valis book - The Devine Invasion, though certainly these themes are present in Valis (book 1) and The Transmigration of Timothy Archer (book 3).
I would also note that these books are not a traditional 'series' in that beyond Valis being mentioned there is no direct connection between the stories.