The Three Stigmata of Palmer Eldritch

In the overcrowded world and cramped space colonies of the late twenty-first century, the wretchedness of life is endured through the use of Can-D, a drug that allows the user to inhabit a shared illusory world. But when the renegade industrialist Palmer Eldritch returns from an interstellar trip, he brings with him a new drug, Chew-Z, which offers a far more addictive experience than Can-D. But could the permanent state of drugged illusion it induces be part of something much more sinister? One of Philip K. Dick's enduring classics, at once a deep character study, a dark mystery, and a tightrope walk along the edge of reality and illusion.