A Scanner Darkly

The novel is semi-autobiographical and draws heavily from the author's personal observations of the drug culture in Orange County during the 1970s. Philip K. Dick witnessed the devastating effects of substance abuse on his peers and intended the book as a tragic, cautionary account of the lives he saw destroyed by addiction.

A 2006 film adaptation directed by Richard Linklater exists, which is widely considered one of the most faithful screen versions of the author's work. It utilizes a digital rotoscoping technique to create a distinct visual style that mirrors the disorienting, hallucinatory experience of the characters.

The afterword provides a poignant, non-fictional conclusion to the story by listing the real-life friends and acquaintances of the author who suffered permanent brain damage or death due to the drug use depicted in the narrative. It serves to ground the preceding science fiction elements in the harsh reality of the author's own experiences.