Most Harmful Books of the Past 200 Years?

I whole-heartedly refuse to be identified as a 'liberal' or 'conservative' (the terms are WAY too simplistic, not to mention always changing). With that said, I came across this list of the "Ten Most Harmful Books of the 19th and 20th Centuries" from Human Events - The National Conservative Weekly, and my first inclination was to read every book on the list. I mean, any group that puts Hitler's Mein Kampf on the same list as the two books perhaps most responsible for the Feminist Revolution (The Feminist Mystique and Second Sex) has to be worth disagreeing with on many levels, right? MIght as well check out some of their enemies. (I've unfortunately only read 10 of the books from the expanded list. Maybe time to add to my summer reading list?)

UPDATE: Two slightly more serious posts on the same list from the Eduwonks and Jenny D.