I just read this a few months ago. Incredible read. Heavy stuff, but very compelling. The bleakness of the world is a little over the top for science fiction, but if you categorize it as sci-fi horror it hits every note.
What really struck me is that this book was published nearly two decades ago, but the author perfectly describes what we would today call a generative AI. Like he understood the theory enough to extrapolate it and put it into a coherent narrative that a reader could understand. Granted it’s not light reading, but it’s not gibberish, either, and I would argue pretty skillfully done.
It’s pretty high on my list of must-read hard sci-fi, although I think if you’re outright turned off by horror elements then it might not resonate.