Tough to get through the beginning of the story; not the best writing. But it gets more bearable to read as the plot unwinds and if your version contains supplemental material, that might be even more important to read than the book itself.

I think it's important to understand when it was written, why, and how it was received rather than just reading it looking to pattern match against modern American fascism. The book isn't really more anti-fascist than it is anti-communist. Above all I'd say it's anti-denialist and anti-complacency; it's a call for people to understand that there is nothing special about liberal democracy that makes it immune to authoritarian collapse, and that constant vigilance is required.