This is a reversal on Dumb Belle actually. In Harry Potter there was an character who was an eccentric smart girl who read books upside down. This image will have a Luna(Harry Potter) edit in soon enough, it would have been better for her to hold it upright on its side and look confused while trying to say an easy word out loud.
Besides. I figured she knows enough to know how a book is held, she just has no clue what upright letters looks like. So she just holds the book open. Looks at a page. Slowly counts the her version of 30. Then turns the page to create the illusion of literacy.