then what do you judge it by? I definitely judge my books by their covers, unless of course someone has recommended something in particular to me. The cover is what draws us in, makes us reach forward and pick it up off the shelf, hold it in our hands.
I'll discard the books with the ominous looking covers; shadows of open doors, or a silhouette walking into the sunset - I instantly decide these books are not for me by it's choice of illustration gracing the bookshelf.
People are very much the same. We are often quick to judge people by their covers, without ever actually picking them up - so to speak - and reading the blurb; a glimpse of what might be in store.
That's where books have an advantage over people.