Harry Potter author JK Rowling on going digital

Harry Potter author, JK Rowling, has announced that her seven wizard adventure novels will be available in e-book form in October. She was speaking at the launch of a new interactive online site Pottermore.

The site will offer previously unpublished material to fans who have bought more than 400 million copies of the Harry Potter books worldwide.

She spoke to BBC News about her publishing phenomenon and the future for print and digital books.