1984 — George Orwell

1984 was ironically banned in the Soviet Union (which it critiqued) but also challenged in the United States during the McCarthy era as "pro-communist." More recently it was banned in the UAE for political content and referenced in debates about social media censorship. It remains the most widely discussed work about censorship — itself regularly subject to censorship attempts — making every ban a form of the very irony Orwell satirised.