In Scotland, where the new Harry Potter book will hit shelves on Saturday, the postal service is concerned about the health of its carriers, who will be expected to deliver thousands of the books preordered from online booksellers in a single day. At issue is the unusual size of the fifth Potter tome – the UK edition runs 768 pages, and weighs in at a full kilogram. So what’s the solution? The Royal Mail may be forced to dispatch a special fleet of vans just to deliver Harry.