Philip K. Dick

Bob Arctor is a dealer of the lethally addictive drug Substance D. Fred is the police agent assigned to tail and eventually bust him. To do so, Fred takes on the identity of a drug dealer named Bob Arctor. And since Substance D--which Arctor takes in massive doses--gradually splits the user's brain into two distinct, …

Clans of the Alphane Moon is a 1964 science fiction novel by Philip K. Dick. It is based on his 1954 short story Shell Game, first published in Galaxy Science Fiction magazine.