The Three Stigmata of Palmer Eldritch

PKD does it again. In a far future where humans are colonising the planets they need to be 'chemically encouraged' with the drug Can-D to maintain their lives in the boredom of life on the bleakest places imaginable. The principle drug involves sitting around a playing board called a Layout - think of Monopoly in 3D - and engaging with each other as the drug blanks their minds and takes them into the game.

Palmer Eldritch is a mystical figure who enters the story with a new drug called Chew-Z that he says eclipses anything else. Of course he wants to sell it because of course he does. But Chew-Z does not require a Layout, and the Layout marketers don't like it.

It sounds like a silly plot but PKD works his magic and we enter the typical PKD world where we question the difference between human sentience and whatever other alternatives are presented.