Harry Potter novels available as eBooks British author J.K. Rowling's seven Harry Potter books are for the first time available for all types of electronic readers. NEW YORK, March 27 (UPI) -- British author J.K. Rowling's seven Harry Potter books are for the first time available for all types of electronic readers. The eBook versions of the blockbuster fantasy novels can be purchased exclusively at Rowling's Pottermore.com Web site as of Tuesday. More than 450 million hard copies of the seven books have been sold since the first installment, "Harry Potter and the Philosopher's Stone," was published in England in 1997.