Still looking for your Christmas / Hanukkah / Festivus gift? Sinclair Lewis's It Can't Happen Here is a perfect choice this year!
In 1935, with Hitler gaining power in Europe, and fascism rising up in various political groups all over the world -- including in America -- the common wisdom said nothing like Hitler could EVER happen in America. Sinclair Lewis's alternative history / SF novel is a scary vision of just how easily it can happen here.
And his fascist president, Buzz Windrip, is a scary archetype for our own Donald Trump.