Permutation City (Subjective Cosmology #2) (1995) 4 stars

The story of a man with a vision - immortality : for those who can …

Best science fiction I've ever read

5 stars

It's hard sci-fi, with the basic conceit that fundamentally, physics literally is math, that everything mathematical literally exists. But what's most gripping is the description of consciousness and simulated or repeated consciousness, and slicing it, and duplicating it, and messing with it. Made me feel weird while reading it, and still does, and informs the way I think about the mind.