LICHFIELD, U.K. – Harry Potter and the Philosopher’s Stone, the British first edition of the first Harry Potter book, has become a Holy Grail for collectors of a certain age. On Monday, July 10 – mere weeks before the fictional boy wizard marks his July 31 birthday, which he shares with author J.K. Rowling – the rare book performed magic again, this time at auction in England. An ex-library copy purchased for the equivalent of 38 cents sold for a hammer price of around $13,500. An American bidder participating via thesaleroom.com came away victorious.