Man in the High Castle, huh? I guess I'd better hit Wiki and at least have an inkling.....
The last chunk of reading I did before my aging eyes got to the less-than-comfortable stage was the Nightsdawn Trilogy by Peter F. Hamilton. Three standalone novels, each split and published as two books, all tied together by the main story for roughly 4,000 pages. Many ideas were explored, some old and some new, but well-integrated.....
Living starships genetically bonded to their human captains, and expiring ships 'procreating' by downloading their life experiences to baby ships.....can you grok organic molecules comprising warp reactors?
Living habitats (Rama, anyone?) likewise linked with their populations both alive and deceased (the 'Consensus').....
Armies of synthetic heavy-set badasses with beetle-carapace-based exoskeletons each with their own 'consensuses' {what the hell is plural?}
Quinn Dexter, an evil motherfucker in command of an almost infinite supply of non-sentient, but extremely catalytic, displaced creatures who give their infectees incredible skills without realizing they're doing so.....
I could go on for days, and I thought Hamilton had done exactly that; it took me almost six months to get through it.
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During my reading stint, I covered almost all of Robert Heinlein and some of Arthur C. Clarke and others, but when I hooked up with Larry Niven (and his collaborations with Dr. Jerry Pournelle) I was in the bag. And I shouldn't forget Greg Benford, the late Dr. Charles Sheffield, and Vernor Vinge (A Fire Upon the Deep). Long story short (too late!), PKD isn't among the cluster of authors I spent time with, but I DID like Blade Runner and wouldn't mind feasting my eyes on Rachael again (was that her name?).....