Chasm City Ace mass-market ed.

"The once-utopian Chasm City a domed human settlement on an otherwise inhospitable planet has been overrun by a virus known as the Melding Plague, capable of infecting any body, organic or computerized. Now, with the entire city corrupted from its people to the very buildings they inhabit only the most wretched, grim sort of existence remains." -- Jacket.