In potter mania, fans own the magic

Harry Potter movies have sold $6 billion in tickets. Clockwise from top, fans at the release of a new Potter book in New York in 2007; J. K. Rowling, left, the Harry Potter creator, with fans at the launch of the Web site Pottermore.com in London on June 23; fun at a Potter theme park in Florida. Clockwise from top, Hiroko masuike for the New York Times; Suzanne Plunkett / Reuters; Chip Litherland for The New York Times