Just put a lampshade on the head instead.
http://news.search.yahoo.com/search/news?p=Andre+Tan+&fr=&c=news_photos
Geez, Jenny, why you always got your head in a book?
Ok, who's got something a little less obvious?
Her mind is an open book.
Flipping through the pages of her mind.
Bookworm.
A novel hat.
I'm a country bumpkin, but I do understand this.