Just finished reading this definitive Orwellian nightmare.
Not really science fiction, but geopolitical futurist. Even though it was written in the late 1940s about 1984, it hasn't dated much as the focus is on extreme politics and sociology. It's a very dark, dystopian window into a place where a single party rules totally. The Party defines reality, and moulds it to suit it's own purpose, which is power for the sake of power without the possibility of being toppled.
I thoroughly enjoyed the read. The political details were interesting, the dystopian abuses of humanity made me grimace, and the doublethink concept mindbending but delightful.
You must read it.
Wiki with spoilers here.