Perdido Street Station

A brilliant book of well-rounded characters and a lavish dystopian world. All at once it manages to be urban fantasy, science fiction and fantasy.

When the protagonist takes on an unusal job from an even more unusual client, he unleashes a terrible evil upon the city that can siphon dreams from sentient beings, leaving them a shallow husk. Engaging the aide of friends and associates alike, and enraging both the city government and a powerful drug lord (for whom which his girlfriend has secretly gone to work), he must race against time to save them all.