With Earth overcrowded and overheating, colonists on Mars take drugs to escape the awful hovel lives in their hovels and briefly inhabit the miniature figurines Perky Pat and Walt. That is, until a new man with a new drug shows up and threatens the future of humanity.
We read Philip K. Dick's 1964 climate change/drug trip novel The Three Stigmata of Palmer Eldritch.
Jacob is away, so guest host Roxane Hudon takes the third seat.