So the other night Loren and I were at a party with many of her co-workers. Somehow the topic of movies came up (surprise surprise) and a young woman said that her favorite movie was "The Wizard of Oz". So, naturally, I asked her how she felt about the differences between the movie and the book (silver slippers vs. ruby slippers was my starting example). She said, "There's a book?"
Let's just stop and think about this for a second. It's her FAVORITE movie (borne out by the fact that I made a casual "munchkin hanging himself" reference later and she said, "Oh no, that's an ostrich that wandered onto the set, not a suicidal midget"). Yet she doesn't know that it's based on a book or even that there IS a book at all.
My mind was totally blown from this. It's like not knowing there is a sequel to Star Wars, or not knowing that Harry Potter is also a book.
Of course, when I was a kid I read not only the original books (Wizard of Oz, Ozma of Oz) but also many many other books set in the Oz universe written by some lady after L. Frank Baum had died (Leila/Lauren, feel free to correct me here!).