Aside from the Bible, few books over time have stirred up such controversy as one composed from the cell of a German prison.
It is a poorly-written mess, according to literary critics, but the ideas contained within Adolf Hitler's 1925 tome "Mein Kampf" (or My Struggle) sadly would resonate well beyond the book's quality of prose.
Mein Kampf was the manifesto from which all of Hitler's atrocities stemmed, a tinderbox of a book that may have disappeared from the annals of history had the author not actually gone on to carry out the ideas presented in his tirade against all things non-German.
Because he did, however, the notorious book remains banned in some parts of the world, more than 80 years later, and has sparked ongoing debates about literary freedoms.
I believe it's in public domain today which means accessible w/ an internet connection for someone who wants to be radicalized w/ antisemitism and beyond. It was a gift to all newlywed German couples and it's among the more published books in history. By the end of the war, about 10 million copies of the book had been sold or distributed in Germany.