K. Rowling's website started selling digital and audiobook editions of all seven Harry Potter novels to English-language readers.

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Sitting reading is a sedentary occupation, and yet no-one is suggesting you should avoid "War and Peace" or the later, over-long Harry Potter novels.

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Ms. Rowling kept the digital book rights to her Harry Potter novels and is expected to begin selling Harry Potter e-books on her website Pottermore later this year.

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Children's Book of the Year was awarded to JK Rowling for the third of her phenomenally successful novels about apprentice wizard Harry Potter, Harry Potter and the Prisoner of Azkaban - a book named by the judges as runner-up to the overall winner.

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