"The Three Stigmata of Palmer Eldritch" is a science fiction novel by Philip K. Dick, first published in 1965. Set in a future where Earth is ravaged by climate change, the story follows a group of colonists on Mars who rely on a drug called Can-D to escape their harsh reality through shared hallucinatory experiences. The central figure of the novel is Palmer Eldritch, a mysterious and enigmatic character who returns from a deep space expedition with a new drug called Chew-Z. Unlike Can-D, Chew-Z offers a more intense and immersive hallucinogenic experience, blurring the lines between reality and illusion even further. As the story progresses, it becomes clear that Palmer Eldritch may not be what he seems, and his true intentions are shrouded in ambiguity. The novel delves into themes of identity, reality, and the nature of consciousness, exploring the psychological and existential implications of the characters' experiences with these mind-altering substances. "The Three Stigmata of Palmer Eldritch" is considered one of Philip K. Dick's most influential works, known for its complex narrative structure, thought-provoking themes, and exploration of the human condition in a dystopian future.