Could be a copy of her most cherished poems, which she wrote herself, that Obama simply "MUST" read! (he is the only one who would understand)
Could be some wacko manifesto on how to "save the world" by getting rid of all the Jews or Mormons or Catholics or anything at all really. I wonder if it was written in Klingon?
This is by no means unique to Obama. Nutty people are constantly trying to give their "personal revelations" to anyone who is rich or famous. Charles Manson was not alone by thinking that the Beatles were singing only to him and giving him 'secret messages'. This is more common than you may imagine, with all kinds of famous people.