Where to start: "The Man in the High Castle" (1962) is an alternative history in which the Axis powers have won World War II and includes a book, banned in America, that posits an alternative history in which Hitler lost. The novel won a Hugo Award and, like much of Dick's work, plays with perception and competing realities.
Where to start, alternative version: "Ubik" (1969) is a mystery wrapped in a horror story told by a (probably) dead man. It has psychic intrigue, government interference, half-alive cryonically frozen characters and a crumbling reality. See also: competing realities, untrustworthy perception.
But then quickly move deep into the stupid with this recommendation:
What to skip: "Do Androids Dream of Electric Sheep?" (1968). Although it served as the inspiration for the film "Blade Runner," the novel is not the same, nor nearly as good.
Told ya...Let 'em know in the comments...