"The Man in the High Castle (1962) is an alternate history novel by American writer Philip K. Dick. Set in 1962, fifteen years after an alternate ending to World War II in which the war lasted until 1947, the novel concerns intrigues between the victorious Axis Powers—Imperial Japan and Nazi Germany—as they rule over the former United States, as well as daily life under the resulting totalitarian rule. The Man in the High Castle won the Hugo Award for Best Novel in 1963.
Reported inspirations include Ward Moore's alternate Civil War history, Bring the Jubilee (1953), various classic World War II histories, and the I Ching (referenced in the novel). The novel features a "novel within the novel" comprising an alternate history within this alternate history wherein the Allies defeat the Axis (though in a manner distinct from the actual historical outcome)."
https://www.primewire.ag/tv-2756739-The- ... e/season-1
https://en.wikipedia.org/wiki/The_Man_i ... igh_Castle