The Hoax of the Twentieth Century

The Hoax of the Twentieth Century: The Case Against the Presumed Extermination of European Jewry is a book by Northwestern University electrical engineering professor Arthur Butz. First published in 1976 by Historical Review Press, it attempts to refute the idea of the Holocaust that Nazi Germany tried to exterminate millions of Jews using homicidal gas chambers during World War 2, and is influential in the Holocaust denial movement. The book has been banned in Canada and is X-rated in Germany where it cannot be displayed or advertised. It has been described as anti-semitic with Alan Davies calling it an "antisemitic classic".

After carrying it for almost 20 years, Amazon.com on March 7, 2017 struck the listing of this book on its website, and those of Createspace and Kindle Direct Publishing. In this process, it also removed listings of all used copies for sale by others. The message to its publisher advised that this action was taken because of "violation of content guidelines."