Diaspora
Diaspora, by Greg Egan, was in several senses too good. Looking at it another way, it was too many good books stuffed into one cover. First, as a novel of the Singularity and whether man will still be man on the other side, the author describes the uploaded mind and culture better in one chapter than many entire novels do. Nor is the problem of immortality taken lightly.
Second, as a sci-fi disaster novel, Diaspora threatens human extinction with distinction, combining branches of physics from the cosmological to the quantum-mechanical to lay waste with impeccable style. Third, as a rare work of math-fiction, it makes technical definitions of Riemann surfaces, topologies, and hypercubes the stuff of novels. Fourth, there are wormholes - credible wormholes.
Fifth, Diaspora covers millenia of time, following what passes for man around the galaxy in a great mission of exploration. Sixth, there are aliens of true alienness, a rare find in a genre partially devoted to the alien. Seventh, there’s a mystery, a hunt for a lost transcendent race. And eighth, and possibly not last, there are other universes.
On the level of fresh ideas, Diaspora is not just a novel, it’s an entire career. In many spots the science, math and alienness were hard going, and could have used more, and more gradual, elaboration - like, say, a novel’s worth. This was a wonderful book, but it would have made a better series.