Chasm City by Alastair Reynolds

In this worthy follow-up to his well-received first novel, Revelation Space (2001), an especially intelligent far-future foray, British author Reynolds transmutes space opera into a noirish, baroque, picaresque mystery tale. Honor requires that Tanner Mirabel, a weapons specialist/bodyguard, track down and destroy the man who killed his boss. Tanner's pursuit takes him to the planet Yellowstone, where a nano-plague has mutated the glittering human cultural showcase of Chasm City into something bizarre, dark and extremely dangerous. He's aided or threatened or both, at different times by a host of human and not-quite-human characters. Relying on his own combat skills and hard-boiled attitude, Tanner keeps seeking revenge even though he begins to wonder why he's doing it, especially after intrusions of other people's memories lead him to suspect he's not who he thinks he is. Inventiveness and tone are Reynolds's strong points. Presented in a sustained burst of weirdness, the novel's details are consistently startling but convincing in context, and the loose ends eventually tie neatly together.