[hcarlens]

Yeah, this book was incredible and the tech in it has aged extremely well. Have you tried any of Ted Chiang's books? They're also great hard sci-fi. Another one that plays with similar ideas to Permutation City is the Bobiverse series by Dennis E. Taylor.

[k__]

I read Bobiverse which was pretty good, at least I liked all but the last book.

Thanks!