A Scanner Darkly

the long version

The protagonist is Bob Arctor, member of a household of drug-users, who is also living a parallel life as Agent Fred, an undercover police agent assigned to spy on Arctor's household. Arctor/Fred shields his true identity from those in the drug subculture, and from the police themselves. (The requirement that narcotics agents remain anonymous, to avoid collusion and other forms of corruption, becomes a critical plot point late in the book.) While supposedly only posing as a drug user, Arctor bec