Did some research. Houghton Mifflin owns the rights to produce Mein Kampf in the States, and donates all royalties from sales of the book to charities that focus on cultural acceptance.
I did...NAZI that one coming.
I guess publishing it led to a movement to remove all HM books from schools in the 40s, but HM has argued basically that for better or worse it's a culturally impacting/important book and (sic) that its best left for people to read and understand it for however ignorant, hateful, or stupid it is. (I agree.)
So...thats pretty awesome. You can buy a copy of it to keep on a shelf of historically important books without the guilt of the money going into some Neo-Nazi's hands.
ETA: Dammit, @Tinuviel beat me to it.