In the novel, renegade biotechnologist Vergil Ulam creates simple biological computers based on his own lymphocytes. Faced with orders from his nervous employer to destroy his work, he injects them into his own body, intending to smuggle the 'noocytes' (as he calls them) out of the company and work on them elsewhere. Inside Ulam's body, the noocytes multiply and evolve rapidly, altering their own genetic material and quickly becoming self-aware. The nanoscale civilization they construct soon begins to transform Ulam, then others. The people who are infected start to find that genetic faults such as myopia and high blood pressure are fixed. The bumps along the spine as well as the nipples fade. Finally, white stripes and ridges start growing over their bodies. Ulam reports that the cells seem to sing. Through infection, conversion and assimilation of humans and other organisms the cells eventually aggregate most of the biosphere of North America into a region seven thousand kilometres wide. This civilization, which incorporates both the evolved noocytes and recently-assimilated conventional humans, is eventually forced to abandon the normal plane of existence in favor of one in which thought does not require a physical substrate. The reason for the noocytes' inability to remain in this reality is somewhat related to the strong anthropic principle. The book's structure is titled "inter-phase", "prophase", "metaphase", "anaphase", "telophase" and "interphase." This mirrors the major phases of cell cycle: interphase and mitosis. This book introduces one of Bear's favorite themes - reality as a function of observers. In Blood Music, reality becomes unstable as the number of observers-trillions of intelligent single-cell organisms-spirals higher and higher. The short story is the first in science fiction to describe microscopic medical machines and to treat DNA as a computational system capable of being reprogrammed; that is, expanded and modified. --Wikipedia

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In the tradition of the greatest cyberpunk novels, Blood Music explores the imminent destruction of mankind and the fear of mass destruction by technological advancements. Blood Music follows present-day events in which the fears concerning the nuclear annihilation of the world subsided after the Cold War and the fear of chemical warfare spilled over into the empty void of nuclear fear. An amazing breakthrough in genetic engineering made by Vergil Ulam is considered too dangerous for further research, but rather than destroy his work, he injects himself with his creation and walks out of his lab, unaware of just quite how his actions will change the world. Author Greg Bear's treatment of the traditional tale of scientific hubris is both suspenseful and a compelling portrait of a new intelligence emerging amongst us, irrevocably changing our world.

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Blood Music by Greg Bear

Nebula Award Finalist: A genetic engineering breakthrough may portend the destruction of humanity in this cyberpunk novel by the author of The Forge of God. This Hugo and Nebula Award finalist follows present-day events in which the fears concerning the nuclear annihilation of the world subsided after the Cold War and the fear of chemical warfare spilled over into the empty void it left behind. An amazing breakthrough in genetic engineering made by Vergil Ulam is considered too dangerous for further research, but rather than destroy his work, he injects himself with his creation and walks out of his lab, unaware of just how his actions will change the world. Author Greg Bear’s treatment of the traditional tale of scientific hubris is both suspenseful and a compelling portrait of a new intelligence emerging amongst us, irrevocably changing our world.