Caliban Book Shop has to be the most remarkable bookstore in the 'Burgh. It isn't quite a used bookstore. You don't go here expecting to find used paperbacks of Steinbeck or Dickens. No, this is really much more of an antique and collector's bookstore. As a reviewer on another site says, the first thing you notice upon entering the place is the sweet scent of old books. I found an old book on pop music once as a gift for my dad. He really loved it.
They do get used textbooks and not-so-rare paperbacks too. So if you want to escape the look-alike world of the major chains (Barnes & Noble or Borders, not that there's anything wrong with those places) then by all means, drop in here!