Download or read book A Scanner Darkly written by Philip K. Dick and published by . This book was released on 1977 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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, combative entities, Fred doesn't realize he is narcing on himself.