Harry Potter's creator moves into the big kid's section this fall. Rowling's first adult offering, a dark comedy titled "The Casual Vacancy," is due to be published in the U.K. and U.S. this September. But the first billionaire author is still earning off of the young wizard. The books finally became available in digital form in 2012 via the online store Pottermore, with Rowling, who shrewdly held onto e-book rights rather than sign them over to her publishers, pocketing much of the sale price. The Pottermore store did over $4 million in sales in its first month. To date, she is the only author to have negotiated such a deal. 2012 marks the 15th anniversary in the U.K. of "Harry Potter and The Philosopher's Stone" (Note: The U.S. edition titled The Sorcerer's Stone was published in 1998); the book was published with an initial print-run of just 500 hardback copies in 1997, which was standard at the time for a first novel. First edition copies have since sold for over $30,000. Rowling appeared in the opening ceremony of the 2012 London Olympics.
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