Finished the VALIS trilogy, which was indubitably mind-warping... I think Transmigration of Timothy Archer
might have been my favorite, not sure. It's not a casual read, that's for sure... my money's on the idea that if God exists, it's insane as that's the only one that seems to fit the evidence lol. All in all an interesting read for a militant agnostic.
Now on to The Past Master
by R.A. Lafferty.