Streetlethal: Book 1 of the Aubry Knight Series
by Steven Barnes

Los Angeles is a teeming metropolis with a rotten core: Deep Maze, where the Thai-VI ghouls—the disease-spreading Spiders—roam. Here the all-powerful Ortegas rule over their empire of drugs, prostitution, and black-market human organs “donated” by their helpless victims.

All Aubry Knight, the former weightless boxing champion, wants is to be left alone. But you’re either with the Ortegas or against them, so they made his life a hell. First they tried to control his mind, then they tried to reduce him to “spare parts.”