Aristoi — Walter Jon Williams

Gabriel is an Aristos, one of the elite of human society, a lord of technology. On the planet he built, in the Realized World, he is like a god.

In the Oneirochronon, Gabriel is only one of many Aristoi, and not the greatest. There in the electronic world of the Hyperlogos, the Aristoi vie for power and prestige in ever-more-complex manipulations of their common virtual reality.

Gabriel has discovered something that threatens the whole human race: somewhere in the galaxy is an Aristos who has gone mad.