Crashland by Sean Williams

crashlandAfter bringing the planet to a screeching halt, Clair Hill begins to see the horror that the replication machines have wrought. An infinity of duplicates swarm the earth, wreaking chaos and mayhem while Clair attempts to find Q, the artificial intelligence that could save them all. Williams explodes the narrative he set up in the first novel with deep philosophical questions about the power of technology. While some use d-mat tech to heal people, others struggle to figure out to whom the consciousness inside a duplicate belongs, and still others realize that duplication is an excellent way to consolidate and maintain political might. (Book #2 in the ‘Twinmaker’ series)