Interesting BBC article here.
"The books we choose to display in our bookcases say a lot as to how we want others to see us," says Mr Sandico. "People who want to appear to have serious or academic reading tastes display their classics, while keeping popular novels at the back of the bookcases."
So what does it say to you when you walk into someone's home and you see a roomful of books? How about homes where there are no books whatsoever?
Personally, I love Cicero's quote that says (paraphrased) "a library is the soul of a home."