Do Androids Dream of Electric Sheep? by Philip K. Dick

War has left the Earth devastated. Through its ruins, bounty hunter Rick Deckard stalks, in search of the renegade replicants who are his prey. When he isn't 'retiring' them, he dreams of owning the ultimate status symbol - a live animal. Then Rick gets a big assignment: to kill six Nexus-6 targets, for a huge reward. But things are never that simple, and Rick's life quickly turns into a nightmare kaleidoscope of subterfuge and deceit. 

A book by author Philip K. Dick.