Here's an interesting article on Ender's Game and Maneuver Warfare (subtitle: How the famed sci-fi novel reflects a revolution in military thinking). When I was in the Marines, we had to read a certain number of books per year, which surprises a lot of people. In order to count, the books had to come from an approved list, most of which were pretty basic biographies of people's experiences in war. I owned Iwo Jima: Legacy of Valor by Bill Ross, and had read it several times (I wrote about another book by Ross here), so I submitted that. It was on the list for Colonels and above, and it gave me enough points for my entire tour of duty. Anyway, my point was that Ender's Game was on the list of approved reads because of its detailed accounts of military strategy.
There's also a boycott of the Ender's Game movie, apparently because Orson Scott Card, the author of the book, is opposed to gay marriage. Read one person's reasoning here. I have to say, I'm unimpressed by her account. She says that Card took her under his wing, and went above and beyond in helping her become an author, never expressed any political or social views to her, and didn't give any indication that he gave a fig that she is gay. But he's opposed to same sex marriage, and that means he's a bad person. I have to agree with what this guy says about her article: she thinks the fact that Card does not support gay marriage indicates homophobia, which in turn indicates hatred for gay people, which she (falsely) equates to racism and advocating violence against gays, and finally to being an inhuman monster. Of course, none of these steps follows from the previous premises, so it's just an exercise in justifying her own hatred of people who do not agree with her politics. At any rate, if I only read books and saw movies that advocated positions I agree with, I'd read and see a lot less.