Adolph Hitler's Nazi manifesto hasn't been on the New York Times bestseller list since the year it was released in the US, 1939.
But now the electronic version of the book is selling like hotcakes on the iTunes bookstore and at least one man thinks he knows why.
Writing for Vocativ, Chris Faraone theorizes the sales are from what’s referred to as the “50 Shades phenomenon.”
The thought is, people are curious about Mein Kampf but don’t want to be seen with the physical book, same as with 50 Shades of Grey.
But ordering an ebook is much more private and allows those with an interest to check out what others may see as taboo.
The Romance Writers Association of America backs that line of thinking up. They maintain their sales are much higher thanks to eBooks and personal readers.
The strong sales aren’t new but the explanation as to what is leading to them is.
No matter the explanation, there are some who are concerned.
The man who leads the World Jewish Congress told ABC News “while the academic study of Mein Kampf is certainly legitimate, we think that responsible companies shouldn't profiteer from the sales of hate books."