A note to Republicans, Libertarians, and disgruntled conservatives...
    I hear from quite a few of you every day, so please understand that I
    can't always respond. As a general rule, if your message contains
    references to Socialism, Communism, Nazis, abortion, gay marriage,
    terrorists, or "lazy" poor people "stealing" your money, then you
    probably won't hear back from me. I'm perfectly willing to respond to
    serious inquiries about the books, but I don't have time to respond to
    name-calling or argue politics all day.

    Update: Many of you seem to be misunderstanding the previous note.
    To be clear, I'm not "scared" to debate political issues with
    conservatives, nor do I wish to deny your rights to free speech. I simply
    don't have an infinite amount of time to explain why I disagree with your
    ideology and/or why I don't think sharing is a communist concept. If you
    have nothing better to do with your time than arguing politics with a
    stranger, then feel free to send your comment -- just don't expect to
    hear back from me.