How do you know by looking at it? Picked up a paperback today that on the surface looks like \link{http://cgi.ebay.co.uk/HARRY-POTTER-PHILOSOPHERS-STONE-HARDBACK-FIRST-EDITION_W0QQitemZ7019294610QQcategoryZ90962QQrdZ1QQcmdZViewItem\this} except his is hardbacked and laminated. How does he know. How would i know??