You might want to read the post before deciding to read the book
via Kuro5hin (which I still can't pronounce):
69 Years Later, Is It Happening Here?
By localroger
Sat Nov 6th, 2004 at 03:12:13 PM ESTBefore 1984, before The Handmaid's Tale, before either the movie or the book by Stephen King, there was Sinclair Lewis' It Can't Happen Here.
Lewis' vision of an American descent into Fascism is as fresh and disturbing today as it was when it was written in 1935. Check out the full text online, and consider with me the continuing relevance of this 69 year old warning.